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Implement and apply PEP 322, reverse iteration

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Raymond Hettinger 2003-11-06 14:06:48 +00:00
parent f607fc5395
commit 85c20a41df
12 changed files with 198 additions and 9 deletions
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2
Lib/random.py
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@ -253,7 +253,7 @@ class Random(_random.Random):
if random is None:
random = self.random
for i in xrange(len(x)-1, 0, -1):
for i in reversed(xrange(1, len(x))):
# pick an element in x[:i+1] with which to exchange x[i]
j = int(random() * (i+1))
x[i], x[j] = x[j], x[i]