Bugs item #1678411, was opened at 2007-03-11 19:07
Message generated for change (Comment added) made by loewis
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Armin Rigo (arigo)
Assigned to: Nobody/Anonymous (nobody)
Summary: StringIO / cStringIO inconsistency with unicode
Initial Comment:
When trying to write unicode strings into a
StringIO.StringIO() or a cStringIO.StringIO()
file, different things occur. (This causes
a failing test in the "mako" project if
cStringIO is not available.) Compare the
following with StringIO or with cStringIO:
f = StringIO()
f.write("\xC0")
f.write(u"hello")
print f.getvalue()
With cStringIO, unicode strings are
immediately encoded as ascii and the
getvalue() returns '\xC0hello'. With
StringIO, on the other hand, the
getvalue() crashes in a ''.join()
trying to convert 'xC0' to unicode.
Normal file() objects follow the same
behavior as cStringIO, so my guess is
that StringIO.py is wrong here.
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>Comment By: Martin v. Löwis (loewis)
Date: 2007-03-11 19:31
Message:
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user_id=21627
Originator: NO
It's intentional that they behave differently. StringIO supports Unicode
strings, cStringIO doesn't. This means that you can build up a large
Unicode string with StringIO, but not with cStringIO.
What should happen when you mix them is debatable.
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