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comp.lang.python

Re: Delete lines containing a specific word

Martin Marcher

1/6/2008 6:50:00 PM

On Sunday 06 January 2008 18:21 Francesco Pietra wrote:

> Please, how to adapt the following script (to delete blank lines) to
> delete lines containing a specific word, or words?
>
> f=open("output.pdb", "r")
> for line in f:
> line=line.rstrip()
> if line:
> print line
> f.close()

>>> import re
>>> s = ["hello", "world", "", "\t ", " ", "#asdfasdf"]
>>> pattern = re.compile("^\s*$")
>>> #only "hello" should be printed as "world" is a word we want to skip
>>> for line in s:
.... if "world" in line:
.... continue
.... if pattern.match(line):
.... continue
.... if line.startswith("#"):
.... continue
.... print line
....
hello
>>>

you have to adapt it to be able to match more than a single word

> If python in Linux accepts lines beginning with # as comment lines, please
> also a script to comment lines containing a specific word, or words, and
> back, to remove #.

yes lines starting with a "#" are comments in python but that shouldn't be
of concern for your input data. I don't quite get what you want here...

hth
martin

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