Awk and Sed One-Liners Explained
Linked by pkrumins on Thu 19th Feb 2009 12:17 UTC
General Development If you have ever been interested in awk and sed Unix utilities, then you probably know about the awk1line.txt and sed1line.txt files that are floating around the Internet. Each file contains around 80 idiomatic sed and awk one-liners for performing various text modification tasks.
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spiderman
Member since:
2008-10-23

First off, Python is not available anywhere, but awk and sed are (almost). Maybe perl is better than python, but anyway, that is not the point.
awk and sed scripts are not there to be maintained. They are not developer tools. They are administrator tools and they are there to make it easy for you to edit or search files quickly. sed and awk are used for one-shot commands in 95% of the cases. Once you have the result, there is no need to maintain the command at all.
How many lines do you have to write in python, just to open a file and read it? In sed or awk, that's 0. The file is open and parsed. There is no way you can make it faster in python.

Edited 2009-02-19 14:22 UTC

Reply Parent Score: 6

vivainio Member since:
2008-12-26

How many lines do you have to write in python, just to open a file and read it?


One. cont = open("file.txt").read().

Or

for line open("file.txt"): do_stuff_with(line)

If that means significant extra work for you, you need a harder problem domain ;-)

Reply Parent Score: 3

RandomGuy Member since:
2006-07-30


for line open("file.txt"): do_stuff_with(line)

That should be:
for line in open("file.txt"): do_stuff_with(line)

If that means significant extra work for you, you need a harder problem domain

Agreed.

Reply Parent Score: 2

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