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| author | Mark Dickinson <dickinsm@gmail.com> | 2009-01-07 17:48:33 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2009-01-07 17:48:33 (GMT) |
| commit | e6dc53120d52f58057fd1a6d666d21cb9d71c08d (patch) | |
| tree | a91c10c8f2856264f7f213e0f98278b431ec58bc /Lib | |
| parent | fde5b803d8f2437e5311bae73c970c7205fcd925 (diff) | |
| download | cpython-e6dc53120d52f58057fd1a6d666d21cb9d71c08d.zip cpython-e6dc53120d52f58057fd1a6d666d21cb9d71c08d.tar.gz cpython-e6dc53120d52f58057fd1a6d666d21cb9d71c08d.tar.bz2 | |
Issue #4869: clarify documentation for random.expovariate.
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/random.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Lib/random.py b/Lib/random.py index 5879340..8b4c38e 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -413,9 +413,11 @@ class Random(_random.Random): def expovariate(self, lambd): """Exponential distribution. - lambd is 1.0 divided by the desired mean. (The parameter would be - called "lambda", but that is a reserved word in Python.) Returned - values range from 0 to positive infinity. + lambd is 1.0 divided by the desired mean. It should be + nonzero. (The parameter would be called "lambda", but that is + a reserved word in Python.) Returned values range from 0 to + positive infinity if lambd is positive, and from negative + infinity to 0 if lambd is negative. """ # lambd: rate lambd = 1/mean |