[Tutor] Re: print out lines that start with a word

[Wolfram Kraus]

Ron Nixon wrote:
Can anyone tell me what I've done wrong in this
script.
I'm trying to get only the lines that start with
"This" for a text file.
Here's what I wrote:

import re
f = open('c:/lines.txt').readlines()
for line in f:
    match = re.search('^This',f)
        if line == match:
                print match

Pardon my ignorance, but why is everybody fond of regexps ;-) ? Are they 
faster? What about good ol' startswith(): 
http://docs.python.org/lib/string-methods.html#l2h-204
Untested:

f = open('c:/lines.txt').readlines()
for line in f:
  if line.startswith('This'):
    print line # Or whatever match is, no regexp-expert here, sorry
Wondering,
Wolfram
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