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SF bug #951915: fix bug in StringIO.truncate - length not changed

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(Patch by Armin Rigo.)
This commit is contained in:
Raymond Hettinger 2004-12-20 23:51:53 +00:00
parent 2ccea17856
commit 6065d32325
2 changed files with 9 additions and 0 deletions
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6
Lib/StringIO.py
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@ -204,6 +204,7 @@ def truncate(self, size=None):
elif size < self.pos: elif size < self.pos:
self.pos = size self.pos = size
self.buf = self.getvalue()[:size] self.buf = self.getvalue()[:size]
self.len = size
def write(self, s): def write(self, s):
"""Write a string to the file. """Write a string to the file.
@ -312,6 +313,11 @@ def test():
print 'File length =', f.tell() print 'File length =', f.tell()
if f.tell() != length: if f.tell() != length:
raise RuntimeError, 'bad length' raise RuntimeError, 'bad length'
f.truncate(length/2)
f.seek(0, 2)
print 'Truncated length =', f.tell()
if f.tell() != length/2:
raise RuntimeError, 'truncate did not adjust length'
f.close() f.close()
if __name__ == '__main__': if __name__ == '__main__':

3
Misc/NEWS
View file

@ -30,6 +30,9 @@ Extension Modules
Library Library
------- -------
- StringIO.truncate() now correctly adjusts the size attribute.
(Bug #951915).
- locale.py now uses an updated locale alias table (built using - locale.py now uses an updated locale alias table (built using
Tools/i18n/makelocalealias.py, a tool to parse the X11 locale Tools/i18n/makelocalealias.py, a tool to parse the X11 locale
alias file); the encoding lookup was enhanced to use Python's alias file); the encoding lookup was enhanced to use Python's