How to pass simple parameter in python

Question

I want to try simple Python code test.py where I want to pass parameter.

import sys    
result = 3 * 3 * <parameter>
print(result)

When I run the Python code i want to pass value as 3 in input parameter so that i can get result 27 at the end. I can run the python code after passing the value in the parameter. For example i can run the python code like below. Is it possible to do in Python ?

 test.py 3

Wander Nauta · Accepted Answer · 2021-09-02 08:25:17Z

3

You were pretty close with the import sys. The first command-line argument is in sys.argv[1], as a string.

import sys    
result = 3 * 3 * int(sys.argv[1])
print(result)

Example:

~ > python test.py 3
27

Assuming some UNIX-like system, you can run your script as a program (so ./test.py 3) by making it executable and adding a shebang; to run your script from everywhere (so test.py 3), add it to your $PATH. Both of these are optional.

Reference

answered Sep 2, 2021 at 8:25

Wander Nauta

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3 Comments

Symonds Over a year ago

thanks and how can i pass string as parameter ?

Wander Nauta Over a year ago

It works the same way. python test.py 3 spam 'eggs foo' will mean sys.argv is ['test.py', '3', 'spam', 'eggs foo']. Feel free to experiment.

Symonds Over a year ago

sorry one more question..for example if i have to pass multiple parameter then how to do that ? For example i have complex code and now i want to pass 3 parameter in different place in my code then does it work in Python ?

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