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

You can use heredoc if you want to keep the source of both bash and python scripts together. For example, say the following are the contents of a file called pyinbash.sh:

#!/bin/bash

echo "Executing a bash statement"
export bashvar=100

cat << EOF > pyscript.py
#!/usr/bin/python
import subprocess

print 'Hello python'
subprocess.call(["echo","$bashvar"])

EOF

chmod 755 pyscript.py

./pyscript.py

Now running pyinbash.sh will yield:

$ chmod 755 pyinbash.sh
$ ./pyinbash.sh
Executing a bash statement
Hello python
100

There are some ways using os.popen() (deprecated) or the whole subprocess module, but this approach

import os
os.system(command)

is one of the easiest.