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Tue May 6 16:45:52 CEST 2014 · https://mail.python.org/pipermail/python-dev/2014-May/134443.html

Hi,

In 3.3 I could do the following

>>> "{x:s}".format(**{'x': [1, 2, 3]})
'[1, 2, 3]'

But in 3.4

>>> "{x:s}".format(**{'x': [1, 2, 3]})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: non-empty format string passed to object.__format__

Is this intentional?

regards,
James Swift
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[Python-Dev] Behaviour change of object().format() in 3.4