No need for Perl. 
$ grep 'genman\.py' C:\python.py

[download]
Or, to print all non-matching lines: 
$ grep -v 'genman\.py' C:\python.py

[download]

In reply to Re: How to find that a line "genman.py" exists in a python file by JavaFan
in thread How to find that a line "genman.py" exists in a python file by Anonymous Monk

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