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v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 73acad1fa2634cb4ec77d8c98bdcd1a8b9c031ed authored by Giampaolo Rodolà on 10 February 2011, 18:42:36 UTC, committed by Giampaolo Rodolà on 10 February 2011, 18:42:36 UTC
1 parent 1fbd8e1
Tip revision: 73acad1fa2634cb4ec77d8c98bdcd1a8b9c031ed authored by Giampaolo Rodolà on 10 February 2011, 18:42:36 UTC
get rid of asyncore.dispatcher's debug attribute, which is no longer used (assuming it ever was).
get rid of asyncore.dispatcher's debug attribute, which is no longer used (assuming it ever was).
Tip revision: 73acad1
test_unpack.py
doctests = """
Unpack tuple
>>> t = (1, 2, 3)
>>> a, b, c = t
>>> a == 1 and b == 2 and c == 3
True
Unpack list
>>> l = [4, 5, 6]
>>> a, b, c = l
>>> a == 4 and b == 5 and c == 6
True
Unpack implied tuple
>>> a, b, c = 7, 8, 9
>>> a == 7 and b == 8 and c == 9
True
Unpack string... fun!
>>> a, b, c = 'one'
>>> a == 'o' and b == 'n' and c == 'e'
True
Unpack generic sequence
>>> class Seq:
... def __getitem__(self, i):
... if i >= 0 and i < 3: return i
... raise IndexError
...
>>> a, b, c = Seq()
>>> a == 0 and b == 1 and c == 2
True
Single element unpacking, with extra syntax
>>> st = (99,)
>>> sl = [100]
>>> a, = st
>>> a
99
>>> b, = sl
>>> b
100
Now for some failures
Unpacking non-sequence
>>> a, b, c = 7
Traceback (most recent call last):
...
TypeError: 'int' object is not iterable
Unpacking tuple of wrong size
>>> a, b = t
Traceback (most recent call last):
...
ValueError: too many values to unpack (expected 2)
Unpacking tuple of wrong size
>>> a, b = l
Traceback (most recent call last):
...
ValueError: too many values to unpack (expected 2)
Unpacking sequence too short
>>> a, b, c, d = Seq()
Traceback (most recent call last):
...
ValueError: need more than 3 values to unpack
Unpacking sequence too long
>>> a, b = Seq()
Traceback (most recent call last):
...
ValueError: too many values to unpack (expected 2)
Unpacking a sequence where the test for too long raises a different kind of
error
>>> class BozoError(Exception):
... pass
...
>>> class BadSeq:
... def __getitem__(self, i):
... if i >= 0 and i < 3:
... return i
... elif i == 3:
... raise BozoError
... else:
... raise IndexError
...
Trigger code while not expecting an IndexError (unpack sequence too long, wrong
error)
>>> a, b, c, d, e = BadSeq()
Traceback (most recent call last):
...
test.test_unpack.BozoError
Trigger code while expecting an IndexError (unpack sequence too short, wrong
error)
>>> a, b, c = BadSeq()
Traceback (most recent call last):
...
test.test_unpack.BozoError
"""
__test__ = {'doctests' : doctests}
def test_main(verbose=False):
from test import support
from test import test_unpack
support.run_doctest(test_unpack, verbose)
if __name__ == "__main__":
test_main(verbose=True)
Computing file changes ...