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bpo-39108: Document threading issues for random.gauss() #22928

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rhettinger merged 1 commit into from
Oct 25, 2020
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bpo-39108: Document threading issues for random.gauss() #22928

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7 changes: 7 additions & 0 deletions 7 Doc/library/random.rst
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Expand Up @@ -319,6 +319,13 @@ be found in any statistics text.
deviation. This is slightly faster than the :func:`normalvariate` function
defined below.

Multithreading note: When two threads call this function
simultaneously, it is possible that they will receive the
same return value. This can be avoided in three ways.
1) Have each thread use a different instance of the random
number generator. 2) Put locks around all calls. 3) Use the
slower, but thread-safe :func:`normalvariate` function instead.


.. function:: lognormvariate(mu, sigma)

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