python: read lines from compressed text files

by

Using gzip.GzipFile:

import gzip

with gzip.open('input.gz','rt') as f:
    for line in f:
        print('got line', line)

Note: gzip.open(filename, mode) is an alias for gzip.GzipFile(filename, mode).
I prefer the former, as it looks similar to with open(...) as f: used for opening uncompressed files.

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