LinuxQuestions.org - extracting particular lines from a text file

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- - extracting particular lines from a text file (https://www.linuxquestions.org/questions/programming-9/extracting-particular-lines-from-a-text-file-679471/)

Quote:

Originally Posted by ghostdog74 (Post 3324156)

you judge for yourself.

Yet yours is less powerful than the example I gave, which can take in input from either STDIN or arbitrarily many files given at the command line.

Quote:

Originally Posted by ghostdog74 (Post 3324156)

Code:

linenumbers = open("file_num").readlines()

linenumbers = [i.strip() for i in linenumbers]

for line in open("file_data"):

    num,content = line.split(":")

    if num in linenumbers:

        print line.strip()

you judge for yourself.

that's quite true (although i don't quite like the way you put your braces). however, with the help of language syntax and features, it CAN be even clearer.

Again, it's people - "i" is unreadable in "[i.strip() for i in linenumbers]" - if I understand Python correctly, it should be

linenumbers = [line.strip() for line in linenumbers]
.

Regarding my braces - if you just ignore them, you'll get the same indentation as Python forces you to use.

Quote:

Originally Posted by abolishtheun (Post 3324166)

Yet yours is less powerful than the example I gave, which can take in input from either STDIN or arbitrarily many files given at the command line.

do you need me to make it more "powerful"?

Quote:

Originally Posted by Sergei Steshenko (Post 3324168)

Regarding my braces - if you just ignore them, you'll get the same indentation as Python forces you to use.

try ignoring them for big projects with few thousand LOC. I am also not about to get deeper into this, so you all can carry on, i'm out.