> I'm just trying to create a new file for all
> the lines that startswith my string. So if my original
> file looks like this:
>
> 1 Line 1
> 1 Line 2
> 2 Line 1
> 2 Line 2
> 3 Line 1
> 4 Line 1
>
> I want to read in all the ones starting with 1 and
> then save them to a new file. I can get the result I
> want there by using :
> If line.startswith('1'):
>
> But can't figure out how to save these lines to
> another file.
Something like this, perhaps?
"""
def filter_file(in_fn, out_fn, to_match):
fin = open(in_fn, "r")
fout = open(out_fn, "w")
for line in fin:
if line.startswith(to_match):
fout.write(line)
fin.close()
fout.close()
"""
Or, to be concise (but less clear):
"""
def filter_file(in_fn, out_fn, to_match):
open(out_fn, "w").write("".join([line for line in open(in_fn, "r") if
line.startswith(to_match)]))
"""
(That's all one line).
=Tony.Meyer
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