New submission from Gawain Bolton <[email protected]>:
Python 2.7.16 (default, Apr 6 2019, 01:42:57)
[GCC 8.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print('{:^10}'.format(None))
None
However this does not work with Python3:
Python 3.7.3 (default, Apr 3 2019, 05:39:12)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print('{:^10}'.format(None))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported format string passed to NoneType.__format__
Given that the None type is output as a string, it makes sense for
string formatting options to be
usable with it. It also makes code
less fragile and avoids having to write special cases for when
values
could be None.
----------
components: Library (Lib)
messages: 341355
nosy: Gawain Bolton
priority: normal
severity: normal
status: open
title: Python3 regresison: String formatting of None object
type: behavior
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Python tracker <[email protected]>
<https://bugs.python.org/issue36787>
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