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Have namedtuple's field renamer assign names that 

are consistent with the corresponding tuple index.
This commit is contained in:
Raymond Hettinger 2009-04-02 22:25:40 +00:00
parent 789be0c0a0
commit 756ab67a98
2 changed files with 7 additions and 7 deletions
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2
Lib/collections.py
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@ -178,7 +178,7 @@ def namedtuple(typename, field_names, verbose=False, rename=False):
if (not all(c.isalnum() or c=='_' for c in name) or _iskeyword(name)
or not name or name[0].isdigit() or name.startswith('_')
or name in seen):
names[i] = '_%d' % (i+1)
names[i] = '_%d' % i
seen.add(name)
field_names = tuple(names)
for name in (typename,) + field_names:

12
Lib/test/test_collections.py
View File

@ -49,12 +49,12 @@ class TestNamedTuple(unittest.TestCase):
def test_name_fixer(self):
for spec, renamed in [
[('efg', 'g%hi'), ('efg', '_2')], # field with non-alpha char
[('abc', 'class'), ('abc', '_2')], # field has keyword
[('8efg', '9ghi'), ('_1', '_2')], # field starts with digit
[('abc', '_efg'), ('abc', '_2')], # field with leading underscore
[('abc', 'efg', 'efg', 'ghi'), ('abc', 'efg', '_3', 'ghi')], # duplicate field
[('abc', '', 'x'), ('abc', '_2', 'x')], # fieldname is a space
[('efg', 'g%hi'), ('efg', '_1')], # field with non-alpha char
[('abc', 'class'), ('abc', '_1')], # field has keyword
[('8efg', '9ghi'), ('_0', '_1')], # field starts with digit
[('abc', '_efg'), ('abc', '_1')], # field with leading underscore
[('abc', 'efg', 'efg', 'ghi'), ('abc', 'efg', '_2', 'ghi')], # duplicate field
[('abc', '', 'x'), ('abc', '_1', 'x')], # fieldname is a space
]:
self.assertEqual(namedtuple('NT', spec, rename=True)._fields, renamed)