How to send part of the output of a Python script to a text file?

Question

I want to only save part of the output of script.py, and to a file in another folder.

script.py prints out a list of file names and their sizes, like

file_asfs.txt- 2KB
file_jsdfhkjh.doc- 17KB
....

If I want to save only the list of file names that are exactly 2KB in a text file /temp/filelist , how do I go about doing that?

In unix you can use sed, awk, grep, etc. to extract the parts you want from the output. — fardjad
– fardjad, Commented Nov 22, 2011 at 5:33

dmnd · Accepted Answer · 2011-11-22 07:32:21Z

2

script.py | grep "\\b2KB$" > output.txt

answered Nov 22, 2011 at 5:34

dmnd

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2 Comments

I want to only save the file names, not the whole string including names and sizes...

I got it, using a combination of grep and awk

Rusty Rob · Accepted Answer · 2011-11-22 06:00:44Z

1

you could create a program to filter it: filter.py:

import sys
for line in sys.stdin:
        line=line.strip()
        if line.endswith("- 2KB"):
                print line

then go

python script.py | python filter.py > /temp/filelist.txt

answered Nov 22, 2011 at 5:53

Rusty Rob

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