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| author | Mark Dickinson <dickinsm@gmail.com> | 2009-01-07 17:48:33 (GMT) |
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| committer | Mark Dickinson <dickinsm@gmail.com> | 2009-01-07 17:48:33 (GMT) |
| commit | e6dc53120d52f58057fd1a6d666d21cb9d71c08d (patch) | |
| tree | a91c10c8f2856264f7f213e0f98278b431ec58bc /Doc/library | |
| 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 'Doc/library')
| -rw-r--r-- | Doc/library/random.rst | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Doc/library/random.rst b/Doc/library/random.rst index 858888c..63c4bc7 100644 --- a/Doc/library/random.rst +++ b/Doc/library/random.rst @@ -210,9 +210,11 @@ be found in any statistics text. .. function:: expovariate(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. + Exponential distribution. *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. .. function:: gammavariate(alpha, beta) |