urllib.urlopen throws OSError

[nectar]

BPO	541980
Nosy	@gvanrossum
Files	urllib.patch: patch for urllib.py

^{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/gvanrossum'
closed_at = <Date 2002-04-15.00:25:20.000>
created_at = <Date 2002-04-10.13:44:26.000>
labels = ['library']
title = 'urllib.urlopen throws OSError'
updated_at = <Date 2002-04-15.00:25:20.000>
user = 'https://bugs.python.org/nectar'

bugs.python.org fields:

activity = <Date 2002-04-15.00:25:20.000>
actor = 'gvanrossum'
assignee = 'gvanrossum'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2002-04-10.13:44:26.000>
creator = 'nectar'
dependencies = []
files = ['416']
hgrepos = []
issue_num = 541980
keywords = []
message_count = 2.0
messages = ['10243', '10244']
nosy_count = 2.0
nosy_names = ['gvanrossum', 'nectar']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue541980'
versions = []

[nectar]

urllib.urlopen throws OSError when processing
file:// (local file) URLs and an error is encountered.
It should instead throw IOError in these cases to be
consistent with the built-in open function and with
the urllib documentation. A patch is attached.

See bug report 482171 for an example of the
consequences of this bug (which was hacked around for
Python 2.2 it appears). The bug also impacts 4Suite's
XSLT processor (using include paths causes an
unhandled exception).

[gvanrossum]

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Thanks; your fix is applied as urllib.py 1.143.