Bugs item #1386675, was opened at 2005-12-21 02:41
Message generated for change (Comment added) made by effbot
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Category: Documentation
Group: Python 2.5
Status: Closed
Resolution: Fixed
Priority: 5
Submitted By: Tony Meyer (anadelonbrin)
Assigned to: Nobody/Anonymous (nobody)
Summary: _winreg specifies EnvironmentError instead of WindowsError

Initial Comment:
The _winreg documentation says that EnvironmentError
will be raised (throughout the docs, for various
reasons), when, in every case, WindowsError is actually
raised.

A simple replace of WindowsError for EnvironmentError
would fix this.  (Let me know if you really need a patch).

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>Comment By: Fredrik Lundh (effbot)
Date: 2005-12-27 09:08

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The original checkin used EnvironmentError in both
the documentation and the docstrings, so this is not
a result of some accidental editing.  Since a good
documentation policy for a portable language is to
document intended usage, not implementation artifacts,
you should at least check with the original authors
before you make the documentation depend on the current
CPython implementation.

(and no, using EnvironmentError is an entirely different
thing than using Exception.  Can we keep the hyperbolic
arguments on comp.lang.python, please?)

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Comment By: Reinhold Birkenfeld (birkenfeld)
Date: 2005-12-27 01:03

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Corrected in rev. 41829/41830.

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Comment By: Tony Meyer (anadelonbrin)
Date: 2005-12-26 03:36

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I don't see what purpose there is in having the
documentation say that EnvironmentError is raised, when a
subclass is.  _winreg is still marked as a temporary module
to be replaced, so it's hard to believe it's some sort of
future-proofing.

One could say that Exception is raised, since
EnvironmentError is a subclass of Exception, but explicit is
better than implicit, right?

(import _winreg fails on non-Windows platforms, so I don't
see how it could be for cross-platform reasons, either).

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Comment By: Fredrik Lundh (effbot)
Date: 2005-12-25 12:44

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however, note that

>>> issubclass(WindowsError, EnvironmentError)
True

on windows, and

>>> issubclass(WindowsError, EnvironmentError)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'WindowsError' is not defined

on non-windows platforms, so it might be done this way
on purpose.

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