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Py30a5 float.is_integer() raises ValueError #47050

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mark-summerfield mannequin opened this issue May 9, 2008 · 8 comments
Closed

Py30a5 float.is_integer() raises ValueError #47050

mark-summerfield mannequin opened this issue May 9, 2008 · 8 comments
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@mdickinson
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type-bug An unexpected behavior, bug, or error

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@mark-summerfield
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Mannequin

mark-summerfield mannequin commented May 9, 2008

BPO 2801
Nosy @mdickinson, @mark-summerfield

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = 'https://github.com/mdickinson'
closed_at = <Date 2008-05-09.16:19:20.625>
created_at = <Date 2008-05-09.11:28:49.866>
labels = ['type-bug']
title = 'Py30a5 float.is_integer() raises ValueError'
updated_at = <Date 2011-11-05.04:40:45.483>
user = 'https://github.com/mark-summerfield'

bugs.python.org fields:

activity = <Date 2011-11-05.04:40:45.483>
actor = 'holdenweb'
assignee = 'mark.dickinson'
closed = True
closed_date = <Date 2008-05-09.16:19:20.625>
closer = 'mark.dickinson'
components = []
creation = <Date 2008-05-09.11:28:49.866>
creator = 'mark'
dependencies = []
files = []
hgrepos = []
issue_num = 2801
keywords = []
message_count = 8.0
messages = ['66465', '66468', '66469', '66470', '66473', '66476', '66481', '147068']
nosy_count = 3.0
nosy_names = ['holdenweb', 'mark.dickinson', 'mark']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue2801'
versions = ['Python 3.0']
@mark-summerfield
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mark-summerfield mannequin commented May 9, 2008

The new method float.is_integer() introduced in Py30a5 behaves unexpectedly:

>>> x = 5.0
>>> x.as_integer_ratio()
(5, 1)
>>> x.is_integer()
Traceback (most recent call last):
  File "<pyshell#20>", line 1, in <module>
    x.is_integer()
ValueError: (11, 'Resource temporarily unavailable')

I was expecting True.

@mark-summerfield mark-summerfield mannequin added the type-bug An unexpected behavior, bug, or error label May 9, 2008
@mdickinson
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Is this on Windows? I can't reproduce it on OS X 10.5.2:

Python 3.0a5+ (py3k:62937M, May  9 2008, 09:32:27) 
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> x = 5.0
>>> x.is_integer()
True

@mdickinson
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This should be fixed in r62938. Mark, can you confirm?

@mdickinson
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That should be r62939, not r62938. Sorry.

@mdickinson mdickinson self-assigned this May 9, 2008
@mark-summerfield
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mark-summerfield mannequin commented May 9, 2008 

On 2008-05-09, Mark Dickinson wrote:
> Mark Dickinson <dickinsm@gmail.com> added the comment:
>
> Is this on Windows?  I can't reproduce it on OS X 10.5.2:
>
> Python 3.0a5+ (py3k:62937M, May  9 2008, 09:32:27)
> [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> x = 5.0
> >>> x.is_integer()
>
> True

I'm on Linux:

'3.0a5 (r30a5:62856, May  9 2008, 11:23:06) \n[GCC 4.1.2 20070925 (Red Hat 
4.1.2-33)]'
>>> (5.).as_integer_ratio()
(5, 1)
>>> (5.).is_integer()
Traceback (most recent call last):
  File "<pyshell#99>", line 1, in <module>
    (5.).is_integer()
ValueError: (11, 'Resource temporarily unavailable')

(I can't test on Windows because Py30a5 isn't available for it yet.)

@mark-summerfield
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mark-summerfield mannequin commented May 9, 2008

OK, I've just built against your fix and it works fine now!

Python 3.0a5+ (py3k:60668:62940, May  9 2008, 15:48:15)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> (5.).as_integer_ratio()
(5, 1)
>>> (5.).is_integer()
True

@mdickinson
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Thanks, Mark.

I've also backported the fix to the trunk in r62943.

@holdenweb
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ValueError: (11, 'Resource temporarily unavailable') looks to me like a Cygwin error relating to Windows' DLLs and the difficulty of mapping them to unique memory locations. I very much doubt it's a real issue with Python, so closing the issue appears to be the correct decision in the absence of further contradictory information from the OP.

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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