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Neaten-up comments and warning message.

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This commit is contained in:
Raymond Hettinger 2010-09-07 20:04:42 +00:00
parent 05a505f106
commit f015b3f5f6
1 changed files with 4 additions and 4 deletions
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8
Lib/random.py
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@ -221,9 +221,8 @@ class Random(_random.Random):
getrandbits = self.getrandbits getrandbits = self.getrandbits
# Only call self.getrandbits if the original random() builtin method # Only call self.getrandbits if the original random() builtin method
# has not been overridden or if a new getrandbits() was supplied. # has not been overridden or if a new getrandbits() was supplied.
# This assures that the two methods correspond.
if type(self.random) is BuiltinMethod or type(getrandbits) is Method: if type(self.random) is BuiltinMethod or type(getrandbits) is Method:
r = getrandbits(k) # 0 <= r < 2**k r = getrandbits(k) # 0 <= r < 2**k
while r >= n: while r >= n:
r = getrandbits(k) r = getrandbits(k)
return r return r
@ -231,11 +230,12 @@ class Random(_random.Random):
# so we can only use random() from here. # so we can only use random() from here.
if k > bpf: if k > bpf:
_warn("Underlying random() generator does not supply \n" _warn("Underlying random() generator does not supply \n"
"enough bits to choose from a population range this large") "enough bits to choose from a population range this large.\n"
"To remove the range limitation, add a getrandbits() method.")
return int(self.random() * n) return int(self.random() * n)
random = self.random random = self.random
N = 1 << k N = 1 << k
r = int(N * random()) r = int(N * random()) # 0 <= r < 2**k
while r >= n: while r >= n:
r = int(N * random()) r = int(N * random())
return r return r