diff options
Diffstat (limited to 'Lib/random.py')
| -rw-r--r-- | Lib/random.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Lib/random.py b/Lib/random.py index a4128c28fb2..97495f0985e 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -96,6 +96,7 @@ LOG4 = _log(4.0) SG_MAGICCONST = 1.0 + _log(4.5) BPF = 53 # Number of bits in a float RECIP_BPF = 2 ** -BPF +_ONE = 1 class Random(_random.Random): @@ -288,7 +289,7 @@ class Random(_random.Random): ## -------------------- integer methods ------------------- - def randrange(self, start, stop=None, step=1): + def randrange(self, start, stop=None, step=_ONE): """Choose a random item from range(start, stop[, step]). This fixes the problem with randint() which includes the @@ -311,7 +312,12 @@ class Random(_random.Random): _warn('randrange() will raise TypeError in the future', DeprecationWarning, 2) raise ValueError("non-integer arg 1 for randrange()") + if stop is None: + # We don't check for "step != 1" because it hasn't been + # type checked and converted to an integer yet. + if step is not _ONE: + raise TypeError('Missing a non-None stop argument') if istart > 0: return self._randbelow(istart) raise ValueError("empty range for randrange()") |