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Code Issues Projects Releases Packages Wiki Activity Actions 14

Closes SF bug 527139. Moved temp variables inside guard.

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This commit is contained in:
Raymond Hettinger 2002-05-13 23:40:14 +00:00
parent 5359ad63ce
commit ca6cdc2c02
1 changed files with 6 additions and 7 deletions
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13
Lib/random.py
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@ -446,14 +446,9 @@ class Random:
def gammavariate(self, alpha, beta): def gammavariate(self, alpha, beta):
# beta times standard gamma # beta times standard gamma
ainv = _sqrt(2.0 * alpha - 1.0) return beta * self.stdgamma(alpha)
return beta * self.stdgamma(alpha, ainv, alpha - LOG4, alpha + ainv)
def stdgamma(self, alpha, ainv, bbb, ccc):
# ainv = sqrt(2 * alpha - 1)
# bbb = alpha - log(4)
# ccc = alpha + ainv
def stdgamma(self, alpha, *args): # *args for Py2.2 compatiblity
random = self.random random = self.random
if alpha <= 0.0: if alpha <= 0.0:
raise ValueError, 'stdgamma: alpha must be > 0.0' raise ValueError, 'stdgamma: alpha must be > 0.0'
@ -464,6 +459,10 @@ class Random:
# variables with non-integral shape parameters", # variables with non-integral shape parameters",
# Applied Statistics, (1977), 26, No. 1, p71-74 # Applied Statistics, (1977), 26, No. 1, p71-74
ainv = _sqrt(2.0 * alpha - 1.0)
bbb = alpha - LOG4
ccc = alpha + ainv
while 1: while 1:
u1 = random() u1 = random()
u2 = random() u2 = random()