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| author | Miss Skeleton (bot) <31488909+miss-islington@users.noreply.github.com> | 2020-10-25 15:48:38 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-10-25 15:48:38 (GMT) |
| commit | af891a962b62268d76ace0d4768ab0e1934a2cd1 (patch) | |
| tree | 35a7bf8c064d0fdcadb3e16300bdd1ca391c4c00 /Doc/library | |
| parent | 2990aef0c804b5d8956c221540bb639983fc0ae4 (diff) | |
| download | cpython-af891a962b62268d76ace0d4768ab0e1934a2cd1.zip cpython-af891a962b62268d76ace0d4768ab0e1934a2cd1.tar.gz cpython-af891a962b62268d76ace0d4768ab0e1934a2cd1.tar.bz2 | |
bpo-39108: Document threading issues for random.gauss() (GH-22928) (GH-22972)
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/random.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/library/random.rst b/Doc/library/random.rst index f9535d7..8154dfc 100644 --- a/Doc/library/random.rst +++ b/Doc/library/random.rst @@ -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) |