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bpo-37439 - Add random.binomialvariate() #14530

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bpo-37439 - Add random.binomialvariate() #14530

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11 changes: 11 additions & 0 deletions Lib/random.py
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Original file line number Diff line number Diff line change
Expand Up @@ -704,6 +704,17 @@ def weibullvariate(self, alpha, beta):
u = 1.0 - self.random()
return alpha * (-_log(u)) ** (1.0/beta)

## -------------------- Binomial distribution --------------------

def binomialvariate(n, p):
""" Binomial distribution for the number of successes
in *n* Bernoulli trials each with a probability *p*
of success.

Returns an integer in the range: 0 <= X <= n
"""
return sum(self.random() < p for i in range(n))

## --------------- Operating System Random Source ------------------

class SystemRandom(Random):
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