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classification
Title: Import value 1e400 from pyc fails
Type: Stage:
Components: Interpreter Core Versions: Python 2.4
process
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: georg.brandl, gjantzen, josiahcarlson, sean_gillespie
Priority: normal Keywords:

Created on 2005-12-11 21:09 by gjantzen, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (4)
msg27043 - (view) Author: Guenter Jantzen (gjantzen) Date: 2005-12-11 21:09 
-------------------------------------------
#file: bug.py
#sys.version_info (2, 4, 2, 'final', 0)
#Platform is Windows XP

import sys, bug
infinity = 1e400

if __name__ == "__main__":
    import bug
    print "Infinity is", bug.infinity

------------------------------------------

This code behaves correct using bug.py - when bug.pyc
is not up to date / not exists:

 Infinity is 1.#INF

and behaves wrong using bug.pyc - when bug.pyc is up to
date:

 Infinity is 1.0
msg27044 - (view) Author: Josiah Carlson (josiahcarlson) * (Python triager) Date: 2005-12-14 06:10 
Logged In: YES 
user_id=341410

This is a known bug with Python and floating point infinity
literals.

You can use:
infinity = 1e155 * 1e155

I believe this is fixed in the latest Python 2.5 SVN.
msg27045 - (view) Author: Sean Gillespie (sean_gillespie) Date: 2007-03-19 13:24 
This does indeed seem to be fixed in Python2.5.  

I was able to reproduce this with Python2.4 with similar results (Windows XP again).  However, in Python2.5, the results are as expected.

Python24:
> python.exe bug.pyc 
Infinity is 1.0

Python25:
> python.exe bug.pyc
Infinity is 1.#INF
msg27046 - (view) Author: Georg Brandl (georg.brandl) * (Python committer) Date: 2007-03-19 16:30 
Fixed, then.
History
Date User Action Args
2022-04-11 14:56:14adminsetgithub: 42679
2005-12-11 21:09:11gjantzencreate