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Compute v only when needed. (#95183)

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Raymond Hettinger 2022-07-23 18:07:17 -05:00 • committed by GitHub
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commit a2fbc51198
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Lib/random.py
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@ -787,7 +787,6 @@ def binomialvariate(self, n=1, p=0.5):
while True: while True:
u = random() u = random()
v = random()
u -= 0.5 u -= 0.5
us = 0.5 - _fabs(u) us = 0.5 - _fabs(u)
k = _floor((2.0 * a / us + b) * u + c) k = _floor((2.0 * a / us + b) * u + c)
@ -796,6 +795,7 @@ def binomialvariate(self, n=1, p=0.5):
# The early-out "squeeze" test substantially reduces # The early-out "squeeze" test substantially reduces
# the number of acceptance condition evaluations. # the number of acceptance condition evaluations.
v = random()
if us >= 0.07 and v <= vr: if us >= 0.07 and v <= vr:
return k return k