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Issue #8300: Let struct.pack use __index__ to convert and pack non-integers.

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Based on a patch by Meador Inge.
This commit is contained in:
Mark Dickinson 2010-04-03 14:05:10 +00:00
parent ae509520de
commit 4846a8e828
4 changed files with 70 additions and 14 deletions
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18
Lib/test/test_struct.py
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@ -315,6 +315,24 @@ class StructTest(unittest.TestCase):
expected = struct.pack(self.format, int(nonint))
self.assertEqual(got, expected)
# Objects with an '__index__' method should be allowed
# to pack as integers.
class Indexable(object):
def __init__(self, value):
self._value = value
def __index__(self):
return self._value
for obj in (Indexable(0), Indexable(10), Indexable(17),
Indexable(42), Indexable(100), Indexable(127)):
try:
struct.pack(format, obj)
except:
self.fail("integer code pack failed on object "
"with '__index__' method")
byteorders = '', '@', '=', '<', '>', '!'
for code in integer_codes:
for byteorder in byteorders: