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updates for chapter 11

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This commit is contained in:
Luciano Ramalho
2014-10-25 08:08:56 -02:00
parent ca049e9a3f
commit 661b68b235
8 changed files with 476 additions and 30 deletions
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8
classes/vector_v2.py
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@@ -26,7 +26,7 @@ Tests with 2-dimensions (same results as ``vector2d_v1.py``)::
(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(Vector([0, 0]))
@@ -132,7 +132,8 @@ class Vector:
return str(tuple(self))
def __bytes__(self):
return bytes(self._components)
return (bytes([ord(self.typecode)]) +
bytes(self._components))
def __eq__(self, other):
return tuple(self) == tuple(other)
@@ -160,5 +161,6 @@ class Vector:
@classmethod
def frombytes(cls, octets):
memv = memoryview(octets).cast(cls.typecode)
typecode = chr(octets[0])
memv = memoryview(octets[1:]).cast(typecode)
return cls(memv)