How to pass python command line argument?

Question

I am a python beginner. Trying to pass some command line arguments. I have used the following codes. But getting errors... transaction_file = argv[1] IndexError: list index out of range.

    import itertools
    import re
    from sys import argv


    print ('Computing frequent item sets.')
    transaction_file = argv[1]
    parameter_file = argv[2]
    output_file = argv[3]

Any help is greatly appreciated. Thanks......

In your cmd, the command to run should be like: python filename.py parameters — Jacob Celestine, Aug 10 '18 at 06:26
Take a look at this tutorial on CLI arguments in python : https://www.tutorialspoint.com/python/python_command_line_arguments.htm — Chuk Ultima, Aug 10 '18 at 06:27

score -1 · Answer 1 · answered Aug 10 '18 at 06:31

-1

Supped of call:

python aaa.py a1 a2 a3

sys.argv len 4 -> sys.argv[3] return the value

or

python aaa.py a1 a2

sys.argv len 3 -> sys.argv[3] going in error

How you call the script?

answered Aug 10 '18 at 06:31

znndrd

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How to pass python command line argument?

1 Answers1