[ python-Bugs-853061 ] bz2:compress empty string inconsistent

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Bugs item #853061, was opened at 2003-12-03 12:43
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Category: Python Library
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: George Yoshida (quiver)
Assigned to: Nobody/Anonymous (nobody)
Summary: bz2:compress empty string inconsistent

Initial Comment:
There are three ways to compress data in bz2 but they 
don't handle an empty string same way.
BZ2File and compress can accept an empty string but 
BZ2Compressor raises ValueError.

>>> import bz2
>>> bz2f = bz2.BZ2File('test', 'w')
>>> bz2f.write('')
>>> bz2f.close()
>>> bz2.compress('')
'BZh9\x17rE8P\x90\x00\x00\x00\x00'
>>> bz2c = bz2.BZ2Compressor()
>>> bz2c.compress('')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: the bz2 library has received wrong 
parameters



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