daviddoji/example-code-2e
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vector2d examples updated after chapter 9 split

Browse Source
This commit is contained in:
Luciano Ramalho
2014-10-20 09:30:33 -02:00
parent 9da839023e
commit 812d416c15
6 changed files with 94 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
classes/vector2d_v2.py
View File

@@ -2,6 +2,8 @@
A 2-dimensional vector class
>>> v1 = Vector2d(3, 4)
>>> print(v1.x, v1.y)
3.0 4.0
>>> x, y = v1
>>> x, y
(3.0, 4.0)
@@ -14,7 +16,7 @@ A 2-dimensional vector class
(3.0, 4.0)
>>> octets = bytes(v1)
>>> octets
b'\\x00\\x00\\x00\\x00\\x00\\x00\\x08@\\x00\\x00\\x00\\x00\\x00\\x00\\x10@'
b'd\\x00\\x00\\x00\\x00\\x00\\x00\\x08@\\x00\\x00\\x00\\x00\\x00\\x00\\x10@'
>>> abs(v1)
5.0
>>> bool(v1), bool(Vector2d(0, 0))
@@ -80,13 +82,15 @@ class Vector2d:
return (i for i in (self.x, self.y))
def __repr__(self):
return 'Vector2d({!r}, {!r})'.format(*self)
class_name = type(self).__name__
return '{}({!r}, {!r})'.format(class_name, *self)
def __str__(self):
return str(tuple(self))
def __bytes__(self):
return bytes(array(Vector2d.typecode, self))
return (bytes([ord(self.typecode)]) +
bytes(array(self.typecode, self)))
def __eq__(self, other):
return tuple(self) == tuple(other)
@@ -113,6 +117,7 @@ class Vector2d:
@classmethod
def frombytes(cls, octets):
memv = memoryview(octets).cast(cls.typecode)
typecode = chr(octets[0])
memv = memoryview(octets[1:]).cast(typecode)
return cls(*memv)
# END VECTOR2D_V2