Shell Script Execute a python program from within a shell script

Question

I ve tried googling the answer but with no luck   I need to use my works supercomputer server  but for my python script to run  it must be executed via a shell script   For example I want job sh to execute python script py  How can this be accomplished

User · Answer

This works for me     Create a new shell file job  So let s say   touch job sh and add command to run python script  you can even add command line arguments to that python  I usually predefine my command line arguments    chmod  x job sh Inside job sh add the following py files  let s say     python file py argument1 argument2 argument3  gt  gt  testpy-output txt  amp  amp  echo  Done with python file py    python file1 py argument1 argument2 argument3  gt  gt  testpy-output txt  amp  amp  echo  Done with python file1 py    Output of job sh should look like this   Done with python file py  Done with python file1 py  I use this usually when I have to run multiple python files with different arguments  pre defined    Note  Just a quick heads up on what s going on here    python file py argument1 argument2 argument3  gt  gt  testpy-output txt  amp  amp  echo  completed with python file py          Here shell script will run the file python file py and add multiple command-line arguments at run time to the python file   This does not necessarily means  you have to pass command line arguments as well   You can just use it like  python python file py  plain and simple   Next up  the    will print and store the output of this  py file in the testpy-output txt file    amp  amp  is a logical operator that will run only after the above is executed successfully and as an optional echo  completed with python file py  will be echoed on to your cli terminal at run time

User · Answer

Save the following program as print py      usr bin python3 print  Hello World     Then in the terminal type   chmod  x print py   print py

User · Answer

Imho  writing   python  path to script py   Is quite wrong  especially in these days  Which python  python2 6  2 7  3 0  3 1  Most of times you need to specify the python version in shebang tag of python file  I encourage to use    usr bin env python2  or python2 6 or python3 or even python3 1 for compatibility   In such case  is much better to have the script executable and invoke it directly       bin bash   path to script py   This way the version of python you need is only written in one file  Most of system these days are having python2 and python3 in the meantime  and it happens that the symlink python points to python3  while most people expect it pointing to python2

User · Answer

Just make sure the python executable is in your PATH environment variable then add in your script  python path to the python script py   Details    In the file job sh  put this       bin sh python python script py     Execute this command to make the script runnable for you   chmod u x job sh Run it     job sh

User · Answer

I use this and it works fine    bin bash  usr bin python python python script py

User · Answer

Method 1 - Create a shell script   Suppose you have a python file hello py Create a file called job sh that contains     bin bash python hello py   mark it executable using    chmod  x job sh   then run it      job sh   Method 2  BETTER  - Make the python itself run from shell   Modify your script hello py and add this as the first line     usr bin env python   mark it executable using    chmod  x hello py   then run it      hello py

User · Answer

Since the other posts say everything  and I stumbled upon this post while looking for the following    Here is a way how to execute a python script from another python script   Python 2   execfile  somefile py   global vars  local vars    Python 3   with open  somefile py   as f      code   compile f read     somefile py    exec       exec code  global vars  local vars    and you can supply args by providing some other sys argv

User · Answer

You should be able to invoke it as python scriptname py e g       bin bash  python  home user scriptname py    Also make sure the script has permissions to run   You can make it executable by using chmod u x scriptname py

User · Answer

This works best for me  Add this at the top of the script     c  Python27 python exe    C  Python27 python exe is the path to the python exe on my machine  Then run the script via   chmod  x script-name py  amp  amp  script-name py

[python] Shell Script: Execute a python program from within a shell script

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