[issue8134] collections.defaultdict gives KeyError with format()
New submission from Greg Jednaszewski jednaszew...@gmail.com:
Found on 2.6.2 and 2.6.4:
I expect that printing an uninitialized variable from a defaultdict should
work. In fact it does with old-style string formatting. However, when you try
to do it with new-style string formatting, it raises a KeyError.
import collections
d = collections.defaultdict(int)
{foo}.format(d)
Traceback (most recent call last):
File stdin, line 1, in module
KeyError: 'foo'
%(foo)d % d
'0'
--
components: Library (Lib)
messages: 101025
nosy: jednaszewski
severity: normal
status: open
title: collections.defaultdict gives KeyError with format()
type: behavior
versions: Python 2.6
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue8134
___
___
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8134] collections.defaultdict gives KeyError with format()
Changes by Ezio Melotti ezio.melo...@gmail.com: -- nosy: +eric.smith, ezio.melotti priority: - normal stage: - test needed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8134 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8134] collections.defaultdict gives KeyError with format()
Eric Smith e...@trueblade.com added the comment:
str.format() does not take a mapping object. You want:
{0[foo]}.format(d)
'0'
--
resolution: - invalid
stage: test needed - committed/rejected
status: open - closed
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue8134
___
___
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8134] collections.defaultdict gives KeyError with format()
Greg Jednaszewski jednaszew...@gmail.com added the comment:
Oops, thanks. I should have known that. However, should this work? This is
what initially led me to file this ticket. My initial example was a bad one.
from collections import defaultdict
d = defaultdict(int)
d['bar'] += 1
{bar}.format(**d)
'1'
{foo}.format(**d)
Traceback (most recent call last):
File stdin, line 1, in module
KeyError: 'foo'
--
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue8134
___
___
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8134] collections.defaultdict gives KeyError with format()
Benjamin Peterson benja...@python.org added the comment: No, because that's not the behavior of keyword arguments. -- nosy: +benjamin.peterson ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8134 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8134] collections.defaultdict gives KeyError with format()
Eric Smith e...@trueblade.com added the comment: See also issue 6081. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8134 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
