[issue4114] struct returns incorrect 4 byte float

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

@loewis: Yes, the initial problem is about unpack("f", bytes). It's 
not possible to exact original 32 bits float value because Python 
forces a conversion to 64 bits float. The behaviour should be 
documented. Don't hesitate to reopen the bug if you consider that 
something should be fixed in Python.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4114>
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