Python – pipe function arguments to command line arguments in python

python

I have a python code (cmd.py) which accepts files as command line arguments and process using parse_args. I want to pass files from another code (files.py) to cmd.py, just like passing function arguments.
Can this be done without modifying cmd.py?

Best Answer

Yes it can be done:

cmd.py `files.py`

Then first files.py is executed and the output (Example: "file1.txt file2.txt") is the input for the cmd.py.

Example:

cat `ls`

This "cats" all the files found by ls in the working directory.

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Shell – Unable to pass a bash variable as a python argument in bash

Perhaps the aws bash command is returning non-printable characters that you don't see with print(). Try removing them with tr:

FOLDER=$(./aws get $BUCKET"/location.txt" | tr -cd "[:print:]")

Scripting – Piping Python Variable Value to Bash Script

Python doesn't expand variables in strings in the same way as bash. If you have VAR in python and want to pass that to bash you could do

subprocess.call('echo {} | /path/to/script --args'.format(VAR), shell=True)

if VAR in python holds the name of a bash variable you want to expand you could do similar:

subprocess.call('echo "${}" | /path/to/script --args'.format(VAR), shell=True)

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