[ python-Bugs-1417699 ] float/atof have become locale aware

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Bugs item #1417699, was opened at 2006-01-29 01:04
Message generated for change (Settings changed) made by gbrandl
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Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
>Priority: 7
Submitted By: Bernhard Herzog (bernhard)
Assigned to: Martin v. Löwis (loewis)
Summary: float/atof have become locale aware

Initial Comment:
The builtin float and the function string.atof have
become locale aware in Python 2.4:

Python 2.4.2 (#1, Nov 29 2005, 16:07:55) 
[GCC 2.95.4 20011002 (Debian prerelease)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> import locale
>>> import string
>>> locale.setlocale(locale.LC_ALL, "de_DE")
'de_DE'
>>> float("1,5")
1.5
>>> string.atof("1,5")
1.5


This doesn't match what's specified in pep 331:

        - float() and str() stay locale-unaware.

It also doesn't match the documentation for atof:

  Convert a string to a floating point number.
  The string must have the standard syntax for a
  floating point literal in Python, optionally
  preceded by a sign ("+" or "-"). Note that this
  behaves identical to the built-in function float()
  when passed a string.

The documentation for float() doesn't state which
format is accepted by float(), though.

The reason for this behavior is ultimately, that
PyOS_ascii_strtod accepts the locale specific
convention in addition to the "C"-locale/python
convention, even though the comment in the code
preceding its definition states:

  This function behaves like the standard strtod() 
  function does in the C locale.




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Comment By: Georg Brandl (birkenfeld)
Date: 2006-02-17 12:19

Message:
Logged In: YES 
user_id=1188172

Martin, you checked in the patch which is mentioned in PEP
331. Is this correct behavior?

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https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1417699&group_id=5470