How do I iterate over all lines of files passed on the commandline in Python?

Question

I usually do this in Perl:

whatever.pl

while(<>) {
    #do whatever;
}

then cat foo.txt | whatever.pl

Now, I want to do this in Python. I tried sys.stdin but I have no idea how to do as I have done in Perl. How can I read the input?

Thanks.

EDIT:

Thanks, I like every single solution.

Answer 1

Try this:

import fileinput
for line in fileinput.input():
    process(line)

Answer 2

import sys
def main():
    for line in sys.stdin:
        print line
if __name__=='__main__':
    sys.exit(main())

Answer 3

Something like this:

import sys

for line in sys.stdin:
    # whatever

Answer 4

import sys

for line in sys.stdin:
    # do stuff w/line

Answer 5

You may find a Rosetta Stone helpful. I tend to use http://www.lurklurk.org/rosetta.html.

Answer 6

Hi i want to do the same in groovy. any suggestion how can i do it?