[Python-bugs-list] [ python-Bugs-429357 ] non-greedy regexp duplicating match bug

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Bugs item #429357, was updated on 2001-06-01 09:29
You can respond by visiting: 
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Category: Regular Expressions
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Matthew Mueller (donut)
Assigned to: Nobody/Anonymous (nobody)
Summary: non-greedy regexp duplicating match bug

Initial Comment:
I found some weird bug, where when a non-greedy match doesn't match anything,
it will duplicate the rest of the string instead of being None. 

#pyrebug.py:
import re
urlrebug=re.compile("""
	(.*?)://			#scheme
	(
		(.*?)			#user
		(?:
			:(.*)		#pass
		)?
	@)?
	(.*?)				#addr
	(?::([0-9]+))?			#port
	(/.*)?$				#path
""", re.VERBOSE)

testbad='foo://bah:81/pth'

print urlrebug.match(testbad).groups()

Bug Output:
>python2.1 pyrebug.py       
('foo', None, 'bah:81/pth', None, 'bah', '81', '/pth')
>python-cvs pyrebug.py       
('foo', None, 'bah:81/pth', None, 'bah', '81', '/pth')

Good (expected) Output:
>python1.5 pyrebug.py       
('foo', None, None, None, 'bah', '81', '/pth')



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