sync from Atlas repo
This commit is contained in:
Luciano Ramalho
59
classes/bingoaddable.py
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59
classes/bingoaddable.py
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@@ -0,0 +1,59 @@
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"""
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======================
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AddableBingoCage tests
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======================
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Tests for __add__ and __iadd__:
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>>> vowels = 'AEIOU'
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>>> globe = AddableBingoCage(vowels)
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>>> len(globe)
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5
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>>> globe.pop() in vowels
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True
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>>> len(globe)
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4
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>>> globe2 = AddableBingoCage('XYZ')
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>>> globe3 = globe + globe2
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>>> len(globe3)
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7
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>>> void = globe + [10, 20]
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Traceback (most recent call last):
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...
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TypeError: unsupported operand type(s) for +: 'AddableBingoCage' and 'list'
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Tests for __add__ and __iadd__:
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>>> globe_orig = globe
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>>> len(globe)
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4
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>>> globe += globe2
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>>> len(globe)
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7
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>>> globe += [10, 20]
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>>> len(globe)
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9
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>>> globe is globe_orig
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True
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"""
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# BEGIN ADDABLE_BINGO
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import itertools # <1>
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from bingobase import BingoCage
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class AddableBingoCage(BingoCage): # <2>
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def __add__(self, other):
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if isinstance(other, AddableBingoCage): # <3>
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return AddableBingoCage(itertools.chain(self, other)) # <4>
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else:
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return NotImplemented
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def __iadd__(self, other):
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self.load(other) # <5>
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return self # <6>
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# END ADDABLE_BINGO
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96
classes/bingobase.py
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96
classes/bingobase.py
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@@ -0,0 +1,96 @@
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"""
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===============
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BingoCage tests
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===============
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Create and load instance from iterable::
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>>> balls = list(range(3))
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>>> globe = BingoCage(balls)
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>>> len(globe)
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3
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Pop and collect balls::
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>>> picks = []
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>>> picks.append(globe.pop())
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>>> picks.append(globe.pop())
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>>> picks.append(globe.pop())
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Check state and results::
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>>> len(globe)
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0
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>>> sorted(picks) == balls
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True
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Reload::
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>>> globe.load(balls)
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>>> len(globe)
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3
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>>> picks = [globe.pop() for i in balls]
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>>> len(globe)
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0
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Load and pop 20 balls to verify that the order has changed::
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>>> balls = list(range(20))
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>>> globe = BingoCage(balls)
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>>> picks = []
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>>> while globe:
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... picks.append(globe.pop())
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>>> len(picks) == len(balls)
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True
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>>> picks != balls
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True
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Also check that the order is not simply reversed either::
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>>> picks[::-1] != balls
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True
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Note: last 2 tests above each have 1 chance in 20! (factorial) of
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failing even if the implementation is OK. 1/20!, or approximately
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4.11e-19, is the probability of the 20 balls coming out, by chance,
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in the exact order the were loaded.
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Check that `LookupError` (or a subclass) is the exception thrown
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when the device is empty::
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>>> globe = BingoCage([])
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>>> try:
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... globe.pop()
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... except LookupError as exc:
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... print('OK')
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OK
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"""
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import random
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class BingoCage():
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def __init__(self, iterable):
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self._balls = []
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self.load(iterable)
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def load(self, iterable):
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self._balls.extend(iterable)
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random.shuffle(self._balls)
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def __len__(self):
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return len(self._balls)
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def pop(self):
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return self._balls.pop()
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def __iter__(self):
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return reversed(self._balls)
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426
classes/vector_py3_5.py
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426
classes/vector_py3_5.py
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@@ -0,0 +1,426 @@
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"""
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A multi-dimensional ``Vector`` class, take 9: operator ``@``
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WARNING: This example requires Python 3.5 or later.
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A ``Vector`` is built from an iterable of numbers::
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>>> Vector([3.1, 4.2])
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Vector([3.1, 4.2])
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>>> Vector((3, 4, 5))
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Vector([3.0, 4.0, 5.0])
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>>> Vector(range(10))
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Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
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Tests with 2-dimensions (same results as ``vector2d_v1.py``)::
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>>> v1 = Vector([3, 4])
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>>> x, y = v1
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>>> x, y
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(3.0, 4.0)
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>>> v1
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Vector([3.0, 4.0])
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>>> v1_clone = eval(repr(v1))
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>>> v1 == v1_clone
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True
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>>> print(v1)
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(3.0, 4.0)
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>>> octets = bytes(v1)
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>>> octets
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b'd\\x00\\x00\\x00\\x00\\x00\\x00\\x08@\\x00\\x00\\x00\\x00\\x00\\x00\\x10@'
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>>> abs(v1)
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5.0
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>>> bool(v1), bool(Vector([0, 0]))
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(True, False)
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Test of ``.frombytes()`` class method:
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>>> v1_clone = Vector.frombytes(bytes(v1))
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>>> v1_clone
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Vector([3.0, 4.0])
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>>> v1 == v1_clone
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True
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Tests with 3-dimensions::
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>>> v1 = Vector([3, 4, 5])
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>>> x, y, z = v1
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>>> x, y, z
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(3.0, 4.0, 5.0)
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>>> v1
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Vector([3.0, 4.0, 5.0])
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>>> v1_clone = eval(repr(v1))
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>>> v1 == v1_clone
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True
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>>> print(v1)
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(3.0, 4.0, 5.0)
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>>> abs(v1) # doctest:+ELLIPSIS
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7.071067811...
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>>> bool(v1), bool(Vector([0, 0, 0]))
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(True, False)
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Tests with many dimensions::
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>>> v7 = Vector(range(7))
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>>> v7
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Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
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>>> abs(v7) # doctest:+ELLIPSIS
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9.53939201...
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Test of ``.__bytes__`` and ``.frombytes()`` methods::
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>>> v1 = Vector([3, 4, 5])
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>>> v1_clone = Vector.frombytes(bytes(v1))
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>>> v1_clone
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Vector([3.0, 4.0, 5.0])
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>>> v1 == v1_clone
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True
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Tests of sequence behavior::
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>>> v1 = Vector([3, 4, 5])
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>>> len(v1)
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3
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>>> v1[0], v1[len(v1)-1], v1[-1]
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(3.0, 5.0, 5.0)
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Test of slicing::
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>>> v7 = Vector(range(7))
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>>> v7[-1]
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6.0
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>>> v7[1:4]
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Vector([1.0, 2.0, 3.0])
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>>> v7[-1:]
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Vector([6.0])
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>>> v7[1,2]
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Traceback (most recent call last):
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...
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TypeError: Vector indices must be integers
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Tests of dynamic attribute access::
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>>> v7 = Vector(range(10))
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>>> v7.x
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0.0
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>>> v7.y, v7.z, v7.t
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(1.0, 2.0, 3.0)
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Dynamic attribute lookup failures::
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>>> v7.k
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Traceback (most recent call last):
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...
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AttributeError: 'Vector' object has no attribute 'k'
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>>> v3 = Vector(range(3))
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>>> v3.t
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Traceback (most recent call last):
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...
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AttributeError: 'Vector' object has no attribute 't'
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>>> v3.spam
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Traceback (most recent call last):
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...
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AttributeError: 'Vector' object has no attribute 'spam'
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Tests of hashing::
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>>> v1 = Vector([3, 4])
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>>> v2 = Vector([3.1, 4.2])
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>>> v3 = Vector([3, 4, 5])
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>>> v6 = Vector(range(6))
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>>> hash(v1), hash(v2), hash(v3), hash(v6)
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(7, 384307168202284039, 2, 1)
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>>> len(set([v1, v2, v3, v6]))
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4
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Tests of ``format()`` with Cartesian coordinates in 2D::
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>>> v1 = Vector([3, 4])
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>>> format(v1)
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'(3.0, 4.0)'
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>>> format(v1, '.2f')
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'(3.00, 4.00)'
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>>> format(v1, '.3e')
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'(3.000e+00, 4.000e+00)'
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Tests of ``format()`` with Cartesian coordinates in 3D and 7D::
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>>> v3 = Vector([3, 4, 5])
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>>> format(v3)
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'(3.0, 4.0, 5.0)'
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>>> format(Vector(range(7)))
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'(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0)'
|
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|
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|
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Tests of ``format()`` with spherical coordinates in 2D, 3D and 4D::
|
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>>> format(Vector([1, 1]), 'h') # doctest:+ELLIPSIS
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'<1.414213..., 0.785398...>'
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>>> format(Vector([1, 1]), '.3eh')
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'<1.414e+00, 7.854e-01>'
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>>> format(Vector([1, 1]), '0.5fh')
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'<1.41421, 0.78540>'
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>>> format(Vector([1, 1, 1]), 'h') # doctest:+ELLIPSIS
|
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'<1.73205..., 0.95531..., 0.78539...>'
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>>> format(Vector([2, 2, 2]), '.3eh')
|
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'<3.464e+00, 9.553e-01, 7.854e-01>'
|
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>>> format(Vector([0, 0, 0]), '0.5fh')
|
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'<0.00000, 0.00000, 0.00000>'
|
||||
>>> format(Vector([-1, -1, -1, -1]), 'h') # doctest:+ELLIPSIS
|
||||
'<2.0, 2.09439..., 2.18627..., 3.92699...>'
|
||||
>>> format(Vector([2, 2, 2, 2]), '.3eh')
|
||||
'<4.000e+00, 1.047e+00, 9.553e-01, 7.854e-01>'
|
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>>> format(Vector([0, 1, 0, 0]), '0.5fh')
|
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'<1.00000, 1.57080, 0.00000, 0.00000>'
|
||||
|
||||
|
||||
Basic tests of operator ``+``::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v2 = Vector([6, 7, 8])
|
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>>> v1 + v2
|
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Vector([9.0, 11.0, 13.0])
|
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>>> v1 + v2 == Vector([3+6, 4+7, 5+8])
|
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True
|
||||
>>> v3 = Vector([1, 2])
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||||
>>> v1 + v3 # short vectors are filled with 0.0 on addition
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Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types::
|
||||
|
||||
>>> v1 + (10, 20, 30)
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Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v1 + v2d
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types, swapped operands::
|
||||
|
||||
>>> (10, 20, 30) + v1
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v2d + v1
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with an unsuitable operand:
|
||||
|
||||
>>> v1 + 1
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'int'
|
||||
>>> v1 + 'ABC'
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'str'
|
||||
|
||||
|
||||
Basic tests of operator ``*``::
|
||||
|
||||
>>> v1 = Vector([1, 2, 3])
|
||||
>>> v1 * 10
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
>>> 10 * v1
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unusual but valid operands::
|
||||
|
||||
>>> v1 * True
|
||||
Vector([1.0, 2.0, 3.0])
|
||||
>>> from fractions import Fraction
|
||||
>>> v1 * Fraction(1, 3) # doctest:+ELLIPSIS
|
||||
Vector([0.3333..., 0.6666..., 1.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unsuitable operands::
|
||||
|
||||
>>> v1 * (1, 2)
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: can't multiply sequence by non-int of type 'Vector'
|
||||
|
||||
|
||||
Tests of operator `==`::
|
||||
|
||||
>>> va = Vector(range(1, 4))
|
||||
>>> vb = Vector([1.0, 2.0, 3.0])
|
||||
>>> va == vb
|
||||
True
|
||||
>>> vc = Vector([1, 2])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> vc == v2d
|
||||
True
|
||||
>>> va == (1, 2, 3)
|
||||
False
|
||||
|
||||
|
||||
Tests of operator `!=`::
|
||||
|
||||
>>> va != vb
|
||||
False
|
||||
>>> vc != v2d
|
||||
False
|
||||
>>> va != (1, 2, 3)
|
||||
True
|
||||
|
||||
|
||||
Tests for operator `@` (Python >= 3.5), computing the dot product::
|
||||
|
||||
>>> va = Vector([1, 2, 3])
|
||||
>>> vz = Vector([5, 6, 7])
|
||||
>>> va @ vz == 38.0 # 1*5 + 2*6 + 3*7
|
||||
True
|
||||
>>> [10, 20, 30] @ vz
|
||||
380.0
|
||||
>>> va @ 3
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for @: 'Vector' and 'int'
|
||||
|
||||
|
||||
"""
|
||||
|
||||
from array import array
|
||||
import reprlib
|
||||
import math
|
||||
import functools
|
||||
import operator
|
||||
import itertools
|
||||
import numbers
|
||||
|
||||
|
||||
class Vector:
|
||||
typecode = 'd'
|
||||
|
||||
def __init__(self, components):
|
||||
self._components = array(self.typecode, components)
|
||||
|
||||
def __iter__(self):
|
||||
return iter(self._components)
|
||||
|
||||
def __repr__(self):
|
||||
components = reprlib.repr(self._components)
|
||||
components = components[components.find('['):-1]
|
||||
return 'Vector({})'.format(components)
|
||||
|
||||
def __str__(self):
|
||||
return str(tuple(self))
|
||||
|
||||
def __bytes__(self):
|
||||
return (bytes([ord(self.typecode)]) +
|
||||
bytes(self._components))
|
||||
|
||||
def __eq__(self, other):
|
||||
if isinstance(other, Vector):
|
||||
return (len(self) == len(other) and
|
||||
all(a == b for a, b in zip(self, other)))
|
||||
else:
|
||||
return NotImplemented
|
||||
|
||||
def __hash__(self):
|
||||
hashes = (hash(x) for x in self)
|
||||
return functools.reduce(operator.xor, hashes, 0)
|
||||
|
||||
def __abs__(self):
|
||||
return math.sqrt(sum(x * x for x in self))
|
||||
|
||||
def __bool__(self):
|
||||
return bool(abs(self))
|
||||
|
||||
def __len__(self):
|
||||
return len(self._components)
|
||||
|
||||
def __getitem__(self, index):
|
||||
cls = type(self)
|
||||
if isinstance(index, slice):
|
||||
return cls(self._components[index])
|
||||
elif isinstance(index, int):
|
||||
return self._components[index]
|
||||
else:
|
||||
msg = '{.__name__} indices must be integers'
|
||||
raise TypeError(msg.format(cls))
|
||||
|
||||
shortcut_names = 'xyzt'
|
||||
|
||||
def __getattr__(self, name):
|
||||
cls = type(self)
|
||||
if len(name) == 1:
|
||||
pos = cls.shortcut_names.find(name)
|
||||
if 0 <= pos < len(self._components):
|
||||
return self._components[pos]
|
||||
msg = '{.__name__!r} object has no attribute {!r}'
|
||||
raise AttributeError(msg.format(cls, name))
|
||||
|
||||
def angle(self, n):
|
||||
r = math.sqrt(sum(x * x for x in self[n:]))
|
||||
a = math.atan2(r, self[n-1])
|
||||
if (n == len(self) - 1) and (self[-1] < 0):
|
||||
return math.pi * 2 - a
|
||||
else:
|
||||
return a
|
||||
|
||||
def angles(self):
|
||||
return (self.angle(n) for n in range(1, len(self)))
|
||||
|
||||
def __format__(self, fmt_spec=''):
|
||||
if fmt_spec.endswith('h'): # hyperspherical coordinates
|
||||
fmt_spec = fmt_spec[:-1]
|
||||
coords = itertools.chain([abs(self)],
|
||||
self.angles())
|
||||
outer_fmt = '<{}>'
|
||||
else:
|
||||
coords = self
|
||||
outer_fmt = '({})'
|
||||
components = (format(c, fmt_spec) for c in coords)
|
||||
return outer_fmt.format(', '.join(components))
|
||||
|
||||
@classmethod
|
||||
def frombytes(cls, octets):
|
||||
typecode = chr(octets[0])
|
||||
memv = memoryview(octets[1:]).cast(typecode)
|
||||
return cls(memv)
|
||||
|
||||
def __add__(self, other):
|
||||
try:
|
||||
pairs = itertools.zip_longest(self, other, fillvalue=0.0)
|
||||
return Vector(a + b for a, b in pairs)
|
||||
except TypeError:
|
||||
return NotImplemented
|
||||
|
||||
def __radd__(self, other):
|
||||
return self + other
|
||||
|
||||
def __mul__(self, scalar):
|
||||
if isinstance(scalar, numbers.Real):
|
||||
return Vector(n * scalar for n in self)
|
||||
else:
|
||||
return NotImplemented
|
||||
|
||||
def __rmul__(self, scalar):
|
||||
return self * scalar
|
||||
|
||||
def __matmul__(self, other):
|
||||
try:
|
||||
return sum(a * b for a, b in zip(self, other))
|
||||
except TypeError:
|
||||
return NotImplemented
|
||||
|
||||
def __rmatmul__(self, other):
|
||||
return self @ other # this only works in Python 3.5
|
||||
@@ -99,7 +99,7 @@ class Vector:
|
||||
|
||||
def __repr__(self):
|
||||
components = reprlib.repr(self._components) # <3>
|
||||
components = components[components.find('['):-1] # <4>
|
||||
components = components[components.find('['):-1] # <4>
|
||||
return 'Vector({})'.format(components)
|
||||
|
||||
def __str__(self):
|
||||
|
||||
@@ -206,10 +206,10 @@ class Vector:
|
||||
def __getattr__(self, name):
|
||||
cls = type(self) # <1>
|
||||
if len(name) == 1: # <2>
|
||||
pos = cls.shortcut_names.find(name) # <3>
|
||||
if 0 <= pos < len(self._components): # <4>
|
||||
pos = cls.shortcut_names.find(name) # <3>
|
||||
if 0 <= pos < len(self._components): # <4>
|
||||
return self._components[pos]
|
||||
msg = '{.__name__!r} object has no attribute {!r}' # <5>
|
||||
msg = '{.__name__!r} object has no attribute {!r}' # <5>
|
||||
raise AttributeError(msg.format(cls, name))
|
||||
|
||||
# END VECTOR_V3_GETATTR
|
||||
@@ -230,7 +230,6 @@ class Vector:
|
||||
|
||||
# END VECTOR_V3_SETATTR
|
||||
|
||||
|
||||
@classmethod
|
||||
def frombytes(cls, octets):
|
||||
typecode = chr(octets[0])
|
||||
|
||||
@@ -201,12 +201,12 @@ class Vector:
|
||||
shortcut_names = 'xyzt'
|
||||
|
||||
def __getattr__(self, name):
|
||||
cls = type(self) # <1>
|
||||
if len(name) == 1: # <2>
|
||||
pos = cls.shortcut_names.find(name) # <3>
|
||||
if 0 <= pos < len(self._components): # <4>
|
||||
cls = type(self)
|
||||
if len(name) == 1:
|
||||
pos = cls.shortcut_names.find(name)
|
||||
if 0 <= pos < len(self._components):
|
||||
return self._components[pos]
|
||||
msg = '{.__name__!r} object has no attribute {!r}' # <5>
|
||||
msg = '{.__name__!r} object has no attribute {!r}'
|
||||
raise AttributeError(msg.format(cls, name))
|
||||
|
||||
@classmethod
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
"""
|
||||
A multi-dimensional ``Vector`` class, take 6
|
||||
A multi-dimensional ``Vector`` class, take 6: operator ``+``
|
||||
|
||||
A ``Vector`` is built from an iterable of numbers::
|
||||
|
||||
@@ -183,19 +183,49 @@ Tests of ``format()`` with spherical coordinates in 2D, 3D and 4D::
|
||||
'<1.00000, 1.57080, 0.00000, 0.00000>'
|
||||
|
||||
|
||||
Tests of operator `==`::
|
||||
Basic tests of operator ``+``::
|
||||
|
||||
>>> v1 = Vector(range(1, 4))
|
||||
>>> v2 = Vector([1.0, 2.0, 3.0])
|
||||
>>> v1 == v2
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v2 = Vector([6, 7, 8])
|
||||
>>> v1 + v2
|
||||
Vector([9.0, 11.0, 13.0])
|
||||
>>> v1 + v2 == Vector([3+6, 4+7, 5+8])
|
||||
True
|
||||
>>> v3 = Vector([1, 2])
|
||||
>>> v1 + v3 # short vectors are filled with 0.0 on addition
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types::
|
||||
|
||||
>>> v1 + (10, 20, 30)
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> Vector([7, 8]) == Vector2d(7, 8)
|
||||
True
|
||||
>>> v1 == (1, 2, 3)
|
||||
False
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v1 + v2d
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types, swapped operands::
|
||||
|
||||
>>> (10, 20, 30) + v1
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v2d + v1
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with an unsuitable operand:
|
||||
|
||||
>>> v1 + 1
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'int'
|
||||
>>> v1 + 'ABC'
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'str'
|
||||
"""
|
||||
|
||||
from array import array
|
||||
@@ -227,14 +257,9 @@ class Vector:
|
||||
return (bytes([ord(self.typecode)]) +
|
||||
bytes(self._components))
|
||||
|
||||
# BEGIN VECTOR_V6_EQ
|
||||
def __eq__(self, other):
|
||||
if isinstance(other, Vector):
|
||||
return (len(self) == len(other) and
|
||||
all(a == b for a, b in zip(self, other)))
|
||||
else:
|
||||
return NotImplemented
|
||||
# END VECTOR_V6_EQ
|
||||
return (len(self) == len(other) and
|
||||
all(a == b for a, b in zip(self, other)))
|
||||
|
||||
def __hash__(self):
|
||||
hashes = (hash(x) for x in self)
|
||||
@@ -299,10 +324,14 @@ class Vector:
|
||||
memv = memoryview(octets[1:]).cast(typecode)
|
||||
return cls(memv)
|
||||
|
||||
# BEGIN VECTOR_V6
|
||||
def __add__(self, other):
|
||||
if len(self) != len(other):
|
||||
cls_name = type(self).__name__
|
||||
msg = 'cannot add {!r} of different dimensions'
|
||||
raise ValueError(msg.format(cls_name))
|
||||
return Vector(a + b for a, b in zip(self, other))
|
||||
try:
|
||||
pairs = itertools.zip_longest(self, other, fillvalue=0.0)
|
||||
return Vector(a + b for a, b in pairs)
|
||||
except TypeError:
|
||||
return NotImplemented
|
||||
|
||||
def __radd__(self, other):
|
||||
return self + other
|
||||
# END VECTOR_V6
|
||||
|
||||
372
classes/vector_v7.py
Normal file
372
classes/vector_v7.py
Normal file
@@ -0,0 +1,372 @@
|
||||
"""
|
||||
A multi-dimensional ``Vector`` class, take 7: operator ``*``
|
||||
|
||||
A ``Vector`` is built from an iterable of numbers::
|
||||
|
||||
>>> Vector([3.1, 4.2])
|
||||
Vector([3.1, 4.2])
|
||||
>>> Vector((3, 4, 5))
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> Vector(range(10))
|
||||
Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
|
||||
|
||||
|
||||
Tests with 2-dimensions (same results as ``vector2d_v1.py``)::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> x, y = v1
|
||||
>>> x, y
|
||||
(3.0, 4.0)
|
||||
>>> v1
|
||||
Vector([3.0, 4.0])
|
||||
>>> v1_clone = eval(repr(v1))
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
>>> print(v1)
|
||||
(3.0, 4.0)
|
||||
>>> octets = bytes(v1)
|
||||
>>> octets
|
||||
b'd\\x00\\x00\\x00\\x00\\x00\\x00\\x08@\\x00\\x00\\x00\\x00\\x00\\x00\\x10@'
|
||||
>>> abs(v1)
|
||||
5.0
|
||||
>>> bool(v1), bool(Vector([0, 0]))
|
||||
(True, False)
|
||||
|
||||
|
||||
Test of ``.frombytes()`` class method:
|
||||
|
||||
>>> v1_clone = Vector.frombytes(bytes(v1))
|
||||
>>> v1_clone
|
||||
Vector([3.0, 4.0])
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
|
||||
|
||||
Tests with 3-dimensions::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> x, y, z = v1
|
||||
>>> x, y, z
|
||||
(3.0, 4.0, 5.0)
|
||||
>>> v1
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> v1_clone = eval(repr(v1))
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
>>> print(v1)
|
||||
(3.0, 4.0, 5.0)
|
||||
>>> abs(v1) # doctest:+ELLIPSIS
|
||||
7.071067811...
|
||||
>>> bool(v1), bool(Vector([0, 0, 0]))
|
||||
(True, False)
|
||||
|
||||
|
||||
Tests with many dimensions::
|
||||
|
||||
>>> v7 = Vector(range(7))
|
||||
>>> v7
|
||||
Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
|
||||
>>> abs(v7) # doctest:+ELLIPSIS
|
||||
9.53939201...
|
||||
|
||||
|
||||
Test of ``.__bytes__`` and ``.frombytes()`` methods::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v1_clone = Vector.frombytes(bytes(v1))
|
||||
>>> v1_clone
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
|
||||
|
||||
Tests of sequence behavior::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> len(v1)
|
||||
3
|
||||
>>> v1[0], v1[len(v1)-1], v1[-1]
|
||||
(3.0, 5.0, 5.0)
|
||||
|
||||
|
||||
Test of slicing::
|
||||
|
||||
>>> v7 = Vector(range(7))
|
||||
>>> v7[-1]
|
||||
6.0
|
||||
>>> v7[1:4]
|
||||
Vector([1.0, 2.0, 3.0])
|
||||
>>> v7[-1:]
|
||||
Vector([6.0])
|
||||
>>> v7[1,2]
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: Vector indices must be integers
|
||||
|
||||
|
||||
Tests of dynamic attribute access::
|
||||
|
||||
>>> v7 = Vector(range(10))
|
||||
>>> v7.x
|
||||
0.0
|
||||
>>> v7.y, v7.z, v7.t
|
||||
(1.0, 2.0, 3.0)
|
||||
|
||||
Dynamic attribute lookup failures::
|
||||
|
||||
>>> v7.k
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 'k'
|
||||
>>> v3 = Vector(range(3))
|
||||
>>> v3.t
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 't'
|
||||
>>> v3.spam
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 'spam'
|
||||
|
||||
|
||||
Tests of hashing::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> v2 = Vector([3.1, 4.2])
|
||||
>>> v3 = Vector([3, 4, 5])
|
||||
>>> v6 = Vector(range(6))
|
||||
>>> hash(v1), hash(v2), hash(v3), hash(v6)
|
||||
(7, 384307168202284039, 2, 1)
|
||||
>>> len(set([v1, v2, v3, v6]))
|
||||
4
|
||||
|
||||
|
||||
Tests of ``format()`` with Cartesian coordinates in 2D::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> format(v1)
|
||||
'(3.0, 4.0)'
|
||||
>>> format(v1, '.2f')
|
||||
'(3.00, 4.00)'
|
||||
>>> format(v1, '.3e')
|
||||
'(3.000e+00, 4.000e+00)'
|
||||
|
||||
|
||||
Tests of ``format()`` with Cartesian coordinates in 3D and 7D::
|
||||
|
||||
>>> v3 = Vector([3, 4, 5])
|
||||
>>> format(v3)
|
||||
'(3.0, 4.0, 5.0)'
|
||||
>>> format(Vector(range(7)))
|
||||
'(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0)'
|
||||
|
||||
|
||||
Tests of ``format()`` with spherical coordinates in 2D, 3D and 4D::
|
||||
|
||||
>>> format(Vector([1, 1]), 'h') # doctest:+ELLIPSIS
|
||||
'<1.414213..., 0.785398...>'
|
||||
>>> format(Vector([1, 1]), '.3eh')
|
||||
'<1.414e+00, 7.854e-01>'
|
||||
>>> format(Vector([1, 1]), '0.5fh')
|
||||
'<1.41421, 0.78540>'
|
||||
>>> format(Vector([1, 1, 1]), 'h') # doctest:+ELLIPSIS
|
||||
'<1.73205..., 0.95531..., 0.78539...>'
|
||||
>>> format(Vector([2, 2, 2]), '.3eh')
|
||||
'<3.464e+00, 9.553e-01, 7.854e-01>'
|
||||
>>> format(Vector([0, 0, 0]), '0.5fh')
|
||||
'<0.00000, 0.00000, 0.00000>'
|
||||
>>> format(Vector([-1, -1, -1, -1]), 'h') # doctest:+ELLIPSIS
|
||||
'<2.0, 2.09439..., 2.18627..., 3.92699...>'
|
||||
>>> format(Vector([2, 2, 2, 2]), '.3eh')
|
||||
'<4.000e+00, 1.047e+00, 9.553e-01, 7.854e-01>'
|
||||
>>> format(Vector([0, 1, 0, 0]), '0.5fh')
|
||||
'<1.00000, 1.57080, 0.00000, 0.00000>'
|
||||
|
||||
|
||||
Basic tests of operator ``+``::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v2 = Vector([6, 7, 8])
|
||||
>>> v1 + v2
|
||||
Vector([9.0, 11.0, 13.0])
|
||||
>>> v1 + v2 == Vector([3+6, 4+7, 5+8])
|
||||
True
|
||||
>>> v3 = Vector([1, 2])
|
||||
>>> v1 + v3 # short vectors are filled with 0.0 on addition
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types::
|
||||
|
||||
>>> v1 + (10, 20, 30)
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v1 + v2d
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types, swapped operands::
|
||||
|
||||
>>> (10, 20, 30) + v1
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v2d + v1
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with an unsuitable operand:
|
||||
|
||||
>>> v1 + 1
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'int'
|
||||
>>> v1 + 'ABC'
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'str'
|
||||
|
||||
|
||||
Basic tests of operator ``*``::
|
||||
|
||||
>>> v1 = Vector([1, 2, 3])
|
||||
>>> v1 * 10
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
>>> 10 * v1
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unusual but valid operands::
|
||||
|
||||
>>> v1 * True
|
||||
Vector([1.0, 2.0, 3.0])
|
||||
>>> from fractions import Fraction
|
||||
>>> v1 * Fraction(1, 3) # doctest:+ELLIPSIS
|
||||
Vector([0.3333..., 0.6666..., 1.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unsuitable operands::
|
||||
|
||||
>>> v1 * (1, 2)
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: can't multiply sequence by non-int of type 'Vector'
|
||||
|
||||
"""
|
||||
|
||||
from array import array
|
||||
import reprlib
|
||||
import math
|
||||
import functools
|
||||
import operator
|
||||
import itertools
|
||||
import numbers
|
||||
|
||||
|
||||
class Vector:
|
||||
typecode = 'd'
|
||||
|
||||
def __init__(self, components):
|
||||
self._components = array(self.typecode, components)
|
||||
|
||||
def __iter__(self):
|
||||
return iter(self._components)
|
||||
|
||||
def __repr__(self):
|
||||
components = reprlib.repr(self._components)
|
||||
components = components[components.find('['):-1]
|
||||
return 'Vector({})'.format(components)
|
||||
|
||||
def __str__(self):
|
||||
return str(tuple(self))
|
||||
|
||||
def __bytes__(self):
|
||||
return (bytes([ord(self.typecode)]) +
|
||||
bytes(self._components))
|
||||
|
||||
def __eq__(self, other):
|
||||
return (len(self) == len(other) and
|
||||
all(a == b for a, b in zip(self, other)))
|
||||
|
||||
def __hash__(self):
|
||||
hashes = (hash(x) for x in self)
|
||||
return functools.reduce(operator.xor, hashes, 0)
|
||||
|
||||
def __abs__(self):
|
||||
return math.sqrt(sum(x * x for x in self))
|
||||
|
||||
def __bool__(self):
|
||||
return bool(abs(self))
|
||||
|
||||
def __len__(self):
|
||||
return len(self._components)
|
||||
|
||||
def __getitem__(self, index):
|
||||
cls = type(self)
|
||||
if isinstance(index, slice):
|
||||
return cls(self._components[index])
|
||||
elif isinstance(index, int):
|
||||
return self._components[index]
|
||||
else:
|
||||
msg = '{.__name__} indices must be integers'
|
||||
raise TypeError(msg.format(cls))
|
||||
|
||||
shortcut_names = 'xyzt'
|
||||
|
||||
def __getattr__(self, name):
|
||||
cls = type(self)
|
||||
if len(name) == 1:
|
||||
pos = cls.shortcut_names.find(name)
|
||||
if 0 <= pos < len(self._components):
|
||||
return self._components[pos]
|
||||
msg = '{.__name__!r} object has no attribute {!r}'
|
||||
raise AttributeError(msg.format(cls, name))
|
||||
|
||||
def angle(self, n):
|
||||
r = math.sqrt(sum(x * x for x in self[n:]))
|
||||
a = math.atan2(r, self[n-1])
|
||||
if (n == len(self) - 1) and (self[-1] < 0):
|
||||
return math.pi * 2 - a
|
||||
else:
|
||||
return a
|
||||
|
||||
def angles(self):
|
||||
return (self.angle(n) for n in range(1, len(self)))
|
||||
|
||||
def __format__(self, fmt_spec=''):
|
||||
if fmt_spec.endswith('h'): # hyperspherical coordinates
|
||||
fmt_spec = fmt_spec[:-1]
|
||||
coords = itertools.chain([abs(self)],
|
||||
self.angles())
|
||||
outer_fmt = '<{}>'
|
||||
else:
|
||||
coords = self
|
||||
outer_fmt = '({})'
|
||||
components = (format(c, fmt_spec) for c in coords)
|
||||
return outer_fmt.format(', '.join(components))
|
||||
|
||||
@classmethod
|
||||
def frombytes(cls, octets):
|
||||
typecode = chr(octets[0])
|
||||
memv = memoryview(octets[1:]).cast(typecode)
|
||||
return cls(memv)
|
||||
|
||||
def __add__(self, other):
|
||||
try:
|
||||
pairs = itertools.zip_longest(self, other, fillvalue=0.0)
|
||||
return Vector(a + b for a, b in pairs)
|
||||
except TypeError:
|
||||
return NotImplemented
|
||||
|
||||
def __radd__(self, other):
|
||||
return self + other
|
||||
|
||||
def __mul__(self, scalar):
|
||||
if isinstance(scalar, numbers.Real):
|
||||
return Vector(n * scalar for n in self)
|
||||
else:
|
||||
return NotImplemented
|
||||
|
||||
def __rmul__(self, scalar):
|
||||
return self * scalar
|
||||
402
classes/vector_v8.py
Normal file
402
classes/vector_v8.py
Normal file
@@ -0,0 +1,402 @@
|
||||
"""
|
||||
A multi-dimensional ``Vector`` class, take 8: operator ``==``
|
||||
|
||||
A ``Vector`` is built from an iterable of numbers::
|
||||
|
||||
>>> Vector([3.1, 4.2])
|
||||
Vector([3.1, 4.2])
|
||||
>>> Vector((3, 4, 5))
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> Vector(range(10))
|
||||
Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
|
||||
|
||||
|
||||
Tests with 2-dimensions (same results as ``vector2d_v1.py``)::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> x, y = v1
|
||||
>>> x, y
|
||||
(3.0, 4.0)
|
||||
>>> v1
|
||||
Vector([3.0, 4.0])
|
||||
>>> v1_clone = eval(repr(v1))
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
>>> print(v1)
|
||||
(3.0, 4.0)
|
||||
>>> octets = bytes(v1)
|
||||
>>> octets
|
||||
b'd\\x00\\x00\\x00\\x00\\x00\\x00\\x08@\\x00\\x00\\x00\\x00\\x00\\x00\\x10@'
|
||||
>>> abs(v1)
|
||||
5.0
|
||||
>>> bool(v1), bool(Vector([0, 0]))
|
||||
(True, False)
|
||||
|
||||
|
||||
Test of ``.frombytes()`` class method:
|
||||
|
||||
>>> v1_clone = Vector.frombytes(bytes(v1))
|
||||
>>> v1_clone
|
||||
Vector([3.0, 4.0])
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
|
||||
|
||||
Tests with 3-dimensions::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> x, y, z = v1
|
||||
>>> x, y, z
|
||||
(3.0, 4.0, 5.0)
|
||||
>>> v1
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> v1_clone = eval(repr(v1))
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
>>> print(v1)
|
||||
(3.0, 4.0, 5.0)
|
||||
>>> abs(v1) # doctest:+ELLIPSIS
|
||||
7.071067811...
|
||||
>>> bool(v1), bool(Vector([0, 0, 0]))
|
||||
(True, False)
|
||||
|
||||
|
||||
Tests with many dimensions::
|
||||
|
||||
>>> v7 = Vector(range(7))
|
||||
>>> v7
|
||||
Vector([0.0, 1.0, 2.0, 3.0, 4.0, ...])
|
||||
>>> abs(v7) # doctest:+ELLIPSIS
|
||||
9.53939201...
|
||||
|
||||
|
||||
Test of ``.__bytes__`` and ``.frombytes()`` methods::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v1_clone = Vector.frombytes(bytes(v1))
|
||||
>>> v1_clone
|
||||
Vector([3.0, 4.0, 5.0])
|
||||
>>> v1 == v1_clone
|
||||
True
|
||||
|
||||
|
||||
Tests of sequence behavior::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> len(v1)
|
||||
3
|
||||
>>> v1[0], v1[len(v1)-1], v1[-1]
|
||||
(3.0, 5.0, 5.0)
|
||||
|
||||
|
||||
Test of slicing::
|
||||
|
||||
>>> v7 = Vector(range(7))
|
||||
>>> v7[-1]
|
||||
6.0
|
||||
>>> v7[1:4]
|
||||
Vector([1.0, 2.0, 3.0])
|
||||
>>> v7[-1:]
|
||||
Vector([6.0])
|
||||
>>> v7[1,2]
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: Vector indices must be integers
|
||||
|
||||
|
||||
Tests of dynamic attribute access::
|
||||
|
||||
>>> v7 = Vector(range(10))
|
||||
>>> v7.x
|
||||
0.0
|
||||
>>> v7.y, v7.z, v7.t
|
||||
(1.0, 2.0, 3.0)
|
||||
|
||||
Dynamic attribute lookup failures::
|
||||
|
||||
>>> v7.k
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 'k'
|
||||
>>> v3 = Vector(range(3))
|
||||
>>> v3.t
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 't'
|
||||
>>> v3.spam
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
AttributeError: 'Vector' object has no attribute 'spam'
|
||||
|
||||
|
||||
Tests of hashing::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> v2 = Vector([3.1, 4.2])
|
||||
>>> v3 = Vector([3, 4, 5])
|
||||
>>> v6 = Vector(range(6))
|
||||
>>> hash(v1), hash(v2), hash(v3), hash(v6)
|
||||
(7, 384307168202284039, 2, 1)
|
||||
>>> len(set([v1, v2, v3, v6]))
|
||||
4
|
||||
|
||||
|
||||
Tests of ``format()`` with Cartesian coordinates in 2D::
|
||||
|
||||
>>> v1 = Vector([3, 4])
|
||||
>>> format(v1)
|
||||
'(3.0, 4.0)'
|
||||
>>> format(v1, '.2f')
|
||||
'(3.00, 4.00)'
|
||||
>>> format(v1, '.3e')
|
||||
'(3.000e+00, 4.000e+00)'
|
||||
|
||||
|
||||
Tests of ``format()`` with Cartesian coordinates in 3D and 7D::
|
||||
|
||||
>>> v3 = Vector([3, 4, 5])
|
||||
>>> format(v3)
|
||||
'(3.0, 4.0, 5.0)'
|
||||
>>> format(Vector(range(7)))
|
||||
'(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0)'
|
||||
|
||||
|
||||
Tests of ``format()`` with spherical coordinates in 2D, 3D and 4D::
|
||||
|
||||
>>> format(Vector([1, 1]), 'h') # doctest:+ELLIPSIS
|
||||
'<1.414213..., 0.785398...>'
|
||||
>>> format(Vector([1, 1]), '.3eh')
|
||||
'<1.414e+00, 7.854e-01>'
|
||||
>>> format(Vector([1, 1]), '0.5fh')
|
||||
'<1.41421, 0.78540>'
|
||||
>>> format(Vector([1, 1, 1]), 'h') # doctest:+ELLIPSIS
|
||||
'<1.73205..., 0.95531..., 0.78539...>'
|
||||
>>> format(Vector([2, 2, 2]), '.3eh')
|
||||
'<3.464e+00, 9.553e-01, 7.854e-01>'
|
||||
>>> format(Vector([0, 0, 0]), '0.5fh')
|
||||
'<0.00000, 0.00000, 0.00000>'
|
||||
>>> format(Vector([-1, -1, -1, -1]), 'h') # doctest:+ELLIPSIS
|
||||
'<2.0, 2.09439..., 2.18627..., 3.92699...>'
|
||||
>>> format(Vector([2, 2, 2, 2]), '.3eh')
|
||||
'<4.000e+00, 1.047e+00, 9.553e-01, 7.854e-01>'
|
||||
>>> format(Vector([0, 1, 0, 0]), '0.5fh')
|
||||
'<1.00000, 1.57080, 0.00000, 0.00000>'
|
||||
|
||||
|
||||
Basic tests of operator ``+``::
|
||||
|
||||
>>> v1 = Vector([3, 4, 5])
|
||||
>>> v2 = Vector([6, 7, 8])
|
||||
>>> v1 + v2
|
||||
Vector([9.0, 11.0, 13.0])
|
||||
>>> v1 + v2 == Vector([3+6, 4+7, 5+8])
|
||||
True
|
||||
>>> v3 = Vector([1, 2])
|
||||
>>> v1 + v3 # short vectors are filled with 0.0 on addition
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types::
|
||||
|
||||
>>> v1 + (10, 20, 30)
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v1 + v2d
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with mixed types, swapped operands::
|
||||
|
||||
>>> (10, 20, 30) + v1
|
||||
Vector([13.0, 24.0, 35.0])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> v2d + v1
|
||||
Vector([4.0, 6.0, 5.0])
|
||||
|
||||
|
||||
Tests of ``+`` with an unsuitable operand:
|
||||
|
||||
>>> v1 + 1
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'int'
|
||||
>>> v1 + 'ABC'
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: unsupported operand type(s) for +: 'Vector' and 'str'
|
||||
|
||||
|
||||
Basic tests of operator ``*``::
|
||||
|
||||
>>> v1 = Vector([1, 2, 3])
|
||||
>>> v1 * 10
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
>>> 10 * v1
|
||||
Vector([10.0, 20.0, 30.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unusual but valid operands::
|
||||
|
||||
>>> v1 * True
|
||||
Vector([1.0, 2.0, 3.0])
|
||||
>>> from fractions import Fraction
|
||||
>>> v1 * Fraction(1, 3) # doctest:+ELLIPSIS
|
||||
Vector([0.3333..., 0.6666..., 1.0])
|
||||
|
||||
|
||||
Tests of ``*`` with unsuitable operands::
|
||||
|
||||
>>> v1 * (1, 2)
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
TypeError: can't multiply sequence by non-int of type 'Vector'
|
||||
|
||||
|
||||
Tests of operator `==`::
|
||||
|
||||
>>> va = Vector(range(1, 4))
|
||||
>>> vb = Vector([1.0, 2.0, 3.0])
|
||||
>>> va == vb
|
||||
True
|
||||
>>> vc = Vector([1, 2])
|
||||
>>> from vector2d_v3 import Vector2d
|
||||
>>> v2d = Vector2d(1, 2)
|
||||
>>> vc == v2d
|
||||
True
|
||||
>>> va == (1, 2, 3)
|
||||
False
|
||||
|
||||
|
||||
Tests of operator `!=`::
|
||||
|
||||
>>> va != vb
|
||||
False
|
||||
>>> vc != v2d
|
||||
False
|
||||
>>> va != (1, 2, 3)
|
||||
True
|
||||
|
||||
"""
|
||||
|
||||
from array import array
|
||||
import reprlib
|
||||
import math
|
||||
import functools
|
||||
import operator
|
||||
import itertools
|
||||
import numbers
|
||||
|
||||
|
||||
class Vector:
|
||||
typecode = 'd'
|
||||
|
||||
def __init__(self, components):
|
||||
self._components = array(self.typecode, components)
|
||||
|
||||
def __iter__(self):
|
||||
return iter(self._components)
|
||||
|
||||
def __repr__(self):
|
||||
components = reprlib.repr(self._components)
|
||||
components = components[components.find('['):-1]
|
||||
return 'Vector({})'.format(components)
|
||||
|
||||
def __str__(self):
|
||||
return str(tuple(self))
|
||||
|
||||
def __bytes__(self):
|
||||
return (bytes([ord(self.typecode)]) +
|
||||
bytes(self._components))
|
||||
|
||||
# BEGIN VECTOR_V8_EQ
|
||||
def __eq__(self, other):
|
||||
if isinstance(other, Vector): # <1>
|
||||
return (len(self) == len(other) and
|
||||
all(a == b for a, b in zip(self, other)))
|
||||
else:
|
||||
return NotImplemented # <2>
|
||||
# END VECTOR_V8_EQ
|
||||
|
||||
def __hash__(self):
|
||||
hashes = (hash(x) for x in self)
|
||||
return functools.reduce(operator.xor, hashes, 0)
|
||||
|
||||
def __abs__(self):
|
||||
return math.sqrt(sum(x * x for x in self))
|
||||
|
||||
def __bool__(self):
|
||||
return bool(abs(self))
|
||||
|
||||
def __len__(self):
|
||||
return len(self._components)
|
||||
|
||||
def __getitem__(self, index):
|
||||
cls = type(self)
|
||||
if isinstance(index, slice):
|
||||
return cls(self._components[index])
|
||||
elif isinstance(index, int):
|
||||
return self._components[index]
|
||||
else:
|
||||
msg = '{.__name__} indices must be integers'
|
||||
raise TypeError(msg.format(cls))
|
||||
|
||||
shortcut_names = 'xyzt'
|
||||
|
||||
def __getattr__(self, name):
|
||||
cls = type(self)
|
||||
if len(name) == 1:
|
||||
pos = cls.shortcut_names.find(name)
|
||||
if 0 <= pos < len(self._components):
|
||||
return self._components[pos]
|
||||
msg = '{.__name__!r} object has no attribute {!r}'
|
||||
raise AttributeError(msg.format(cls, name))
|
||||
|
||||
def angle(self, n):
|
||||
r = math.sqrt(sum(x * x for x in self[n:]))
|
||||
a = math.atan2(r, self[n-1])
|
||||
if (n == len(self) - 1) and (self[-1] < 0):
|
||||
return math.pi * 2 - a
|
||||
else:
|
||||
return a
|
||||
|
||||
def angles(self):
|
||||
return (self.angle(n) for n in range(1, len(self)))
|
||||
|
||||
def __format__(self, fmt_spec=''):
|
||||
if fmt_spec.endswith('h'): # hyperspherical coordinates
|
||||
fmt_spec = fmt_spec[:-1]
|
||||
coords = itertools.chain([abs(self)],
|
||||
self.angles())
|
||||
outer_fmt = '<{}>'
|
||||
else:
|
||||
coords = self
|
||||
outer_fmt = '({})'
|
||||
components = (format(c, fmt_spec) for c in coords)
|
||||
return outer_fmt.format(', '.join(components))
|
||||
|
||||
@classmethod
|
||||
def frombytes(cls, octets):
|
||||
typecode = chr(octets[0])
|
||||
memv = memoryview(octets[1:]).cast(typecode)
|
||||
return cls(memv)
|
||||
|
||||
def __add__(self, other):
|
||||
try:
|
||||
pairs = itertools.zip_longest(self, other, fillvalue=0.0)
|
||||
return Vector(a + b for a, b in pairs)
|
||||
except TypeError:
|
||||
return NotImplemented
|
||||
|
||||
def __radd__(self, other):
|
||||
return self + other
|
||||
|
||||
def __mul__(self, scalar):
|
||||
if isinstance(scalar, numbers.Real):
|
||||
return Vector(n * scalar for n in self)
|
||||
else:
|
||||
return NotImplemented
|
||||
|
||||
def __rmul__(self, scalar):
|
||||
return self * scalar
|
||||
Reference in New Issue
Block a user