Call Python script from bash with argument

Question

I know that I can run a python script from my bash script using the following   python python script py   But what about if I wanted to pass a variable   argument to my python script from my bash script  How can I do that   Basically bash will work out a filename and then python will upload it  but I need to send the filename from bash to python when I call it

User · Answer

I have a bash script that calls a small python routine to display a message window. As I need to use killall to stop the python script I can't use the above method as it would then mean running killall python which could take out other python programmes so I use

pythonprog.py "$argument" & # The & returns control straight to the bash script so must be outside the backticks. The preview of this message is showing it without "`" either side of the command for some reason.

As long as the python script will run from the cli by name rather than python pythonprog.py this works within the script. If you need more than one argument just use a space between each one within the quotes.

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Print all args without the filename  for i in range 1  len sys argv    print sys argv i

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Embedded option   Wrap python code in a bash function      bin bash  function current datetime   python -  lt  lt END import datetime print datetime datetime now   END      Call it current datetime    Call it and capture the output DT   current datetime  echo Current date and time   DT   Use environment variables  to pass data into to your embedded python script      bin bash  function line   PYTHON ARG   1  python -  lt  lt END import os line len   int os environ  PYTHON ARG    print  -    line len END      Do it one way line 80    Do it another way echo   line 80    http   bhfsteve blogspot se 2014 07 embedding-python-in-bash-scripts html

User · Answer

Beside sys argv  also take a look at the argparse module  which helps define options and arguments for scripts      The argparse module makes it easy to write user-friendly command-line interfaces

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use in the script   echo   python python script py arg1 arg2   gt   dev null   or  python python script py  string arg    gt   dev null   The script will be executed without output

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To execute a python script in a bash script you need to call the same command that you would within a terminal  For instance    gt  python python script py var1 var2   To access these variables within python you will need  import sys print sys argv 0    prints python script py print sys argv 1    prints var1 print sys argv 2    prints var2

User · Answer

Use  python python script py filename   and in your Python script  import sys print sys argv 1

User · Answer

and take a look at the getopt module  It works quite good for me

[python] Call Python script from bash with argument

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