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v0.8.1
v0.8.1
Revision f78dd3452d99318195bf3dc7a4266ca5f12dfe11 authored by Georg Brandl on 13 August 2009, 08:58:24 UTC, committed by Georg Brandl on 13 August 2009, 08:58:24 UTC
svn+ssh://svn.python.org/python/branches/py3k ........ r73592 | ezio.melotti | 2009-06-28 00:58:15 +0200 (So, 28 Jun 2009) | 1 line Updated the last example as requested in #6350 ........ r73823 | ezio.melotti | 2009-07-04 03:14:30 +0200 (Sa, 04 Jul 2009) | 1 line #6398 typo: versio. -> version. ........
1 parent a5ea7e3
Vec.py
# A simple vector class
def vec(*v):
return Vec(*v)
class Vec:
def __init__(self, *v):
self.v = list(v)
def fromlist(self, v):
if not isinstance(v, list):
raise TypeError
self.v = v[:]
return self
def __repr__(self):
return 'vec(' + repr(self.v)[1:-1] + ')'
def __len__(self):
return len(self.v)
def __getitem__(self, i):
return self.v[i]
def __add__(self, other):
# Element-wise addition
v = list(map(lambda x, y: x+y, self, other))
return Vec().fromlist(v)
def __sub__(self, other):
# Element-wise subtraction
v = list(map(lambda x, y: x-y, self, other))
return Vec().fromlist(v)
def __mul__(self, scalar):
# Multiply by scalar
v = [x*scalar for x in self.v]
return Vec().fromlist(v)
def test():
a = vec(1, 2, 3)
b = vec(3, 2, 1)
print(a)
print(b)
print(a+b)
print(a-b)
print(a*3.0)
test()
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