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| author | Raymond Hettinger <python@rcn.com> | 2011-06-25 09:24:35 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2011-06-25 09:24:35 (GMT) |
| commit | cba87311d2dc395cbc56d00d7161d191ff7375d2 (patch) | |
| tree | aa900d71c6f4789ee1052a3e464883cd42d82e7d /Lib/random.py | |
| parent | cb9bf1ac9c420249f9598931c777b9df83a8d22d (diff) | |
| download | cpython-cba87311d2dc395cbc56d00d7161d191ff7375d2.zip cpython-cba87311d2dc395cbc56d00d7161d191ff7375d2.tar.gz cpython-cba87311d2dc395cbc56d00d7161d191ff7375d2.tar.bz2 | |
Code simplification suggested by Sven Marnach.
Diffstat (limited to 'Lib/random.py')
| -rw-r--r-- | Lib/random.py | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Lib/random.py b/Lib/random.py index 987cff1..36b9565 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -427,11 +427,9 @@ class Random(_random.Random): # lambd: rate lambd = 1/mean # ('lambda' is a Python reserved word) - random = self.random - u = random() - while u <= 1e-7: - u = random() - return -_log(u)/lambd + # we use 1-random() instead of random() to preclude the + # possibility of taking the log of zero. + return -_log(1.0 - self.random())/lambd ## -------------------- von Mises distribution -------------------- |