Re: How to delete a line with re?

[Edwin.Madari]

running this snippet, is blanking out ^abdc$.. what is the issue ?
abcd
efg
hijk
lmn
$

efg
hijk
lmn

regards
Edwin

-----Original Message-----
From: py************************************************ **@python.org
[mailto:py***************************************** *********@python.org]
On Behalf Of Peng Yu
Sent: Sunday, August 17, 2008 11:47 PM
To: py*********@python.org
Subject: How to delete a line with re?
Hi,

I want to delete the line with abc in the following program. But the
following program does not do what I want. Can somebody let me know
how to do it?

Thanks,
Peng

#!/usr/bin/python

import re

file="""abcd
efg
hijk
lmn
"""

regex = re.compile("^abcd$", re.MULTILINE)

print file,
print "$"
print regex.sub('', file),
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[John Machin]

On Aug 18, 10:56 pm, [e-mail] wrote:

running this snippet, is blanking out ^abdc$.. what is the issue ?
abcd
efg
hijk
lmn
$

efg
hijk
lmn

The OP said he wanted to delete the line with abc [sic]. He showed no
interest in "blanking out ^abdc$. [sic]". The given snippet deletes
the abcd but doesn't delete the newline. However the OP gave no clue
as to what the actual problem was -- he may have had a trailing space
or two after the abcd in the input line; this would not be matched by
the pattern and so nothing would be deleted.