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Issue #9509: make argarse properly handle IOErrors raised by argparse.FileType. Approved by Georg in the tracker.

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This commit is contained in:
Steven Bethard 2011-01-24 21:02:50 +00:00
parent 2a6ac15f26
commit b02701101b
3 changed files with 24 additions and 15 deletions
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13
Lib/argparse.py
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@ -1121,7 +1121,7 @@ class FileType(object):
the builtin open() function.
"""
def __init__(self, mode='r', bufsize=None):
def __init__(self, mode='r', bufsize=-1):
self._mode = mode
self._bufsize = bufsize
@ -1137,14 +1137,15 @@ class FileType(object):
raise ValueError(msg)
# all other arguments are used as file names
if self._bufsize:
try:
return open(string, self._mode, self._bufsize)
else:
return open(string, self._mode)
except IOError as e:
message = _("can't open '%s': %s")
raise ArgumentTypeError(message % (string, e))
def __repr__(self):
args = [self._mode, self._bufsize]
args_str = ', '.join([repr(arg) for arg in args if arg is not None])
args = self._mode, self._bufsize
args_str = ', '.join(repr(arg) for arg in args if arg != -1)
return '%s(%s)' % (type(self).__name__, args_str)
# ===========================