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| author | Raymond Hettinger <python@rcn.com> | 2003-10-05 09:09:15 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2003-10-05 09:09:15 (GMT) |
| commit | 2f726e9093381572b21edbfc42659ea89fbdf686 (patch) | |
| tree | 9625e748344e1709fc69a8b98298efdd602b4cc2 /Misc | |
| parent | 5c68ef04b7f0c0c1d342647a7db2d3f76637d3fa (diff) | |
| download | cpython-2f726e9093381572b21edbfc42659ea89fbdf686.zip cpython-2f726e9093381572b21edbfc42659ea89fbdf686.tar.gz cpython-2f726e9093381572b21edbfc42659ea89fbdf686.tar.bz2 | |
SF bug #812202: randint is always even
* Added C coded getrandbits(k) method that runs in linear time.
* Call the new method from randrange() for ranges >= 2**53.
* Adds a warning for generators not defining getrandbits() whenever they
have a call to randrange() with too large of a population.
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -84,6 +84,14 @@ Library seed. Modified to match Py2.2 behavior and use fractional seconds so that successive runs are more likely to produce different sequences. +- random.Random has a new method, getrandbits(k), which returns an int + with k random bits. This method is now an optional part of the API + for user defined generators. Any generator that defines genrandbits() + can now use randrange() for ranges with a length >= 2**53. Formerly, + randrange would return only even numbers for ranges that large (see + SF bug #812202). Generators that do not define genrandbits() now + issue a warning when randrange() is called with a range that large. + - itertools.izip() with no arguments now returns an empty iterator instead of raising a TypeError exception. |