Add the following line to the top of the script to run default python interpreter:

#!/usr/bin/python

To specify the python version then add the version number after python:

#!/usr/bin/python2.7

If you have a local build of python and would like to use that:

#!/usr/bin/env python

Then you will need to make your script executable by running the following command:

chmod +x script.py

To run the script:

./script.py

Use a shebang line at top of your script as below:

!/usr/bin/python

Update appropriate python version on which you want to execute the script. e.g. For python 3.6 its

!/usr/bin/python3.6

for default interpreter

!/usr/bin/python

Note: Make sure script has executable permission.

Use:

#!/usr/bin/env python

This will ensure that the python the user expects to be used will be the one that runs the script. This is especially important if the user is using virtualenv to have a specific version of python in a given environment.

Under linux you can simply use the hashbang(aka shebang). Add the line

#!/usr/bin/python

if you want to execute the default python interpreter.

#!/path/to/python[x.x]

to use some specific version, or

#!/usr/bin/env python

If you want the environment to find python for you.

You will also be required to make the script executable

chmod +x script[.py] 

There are two things you need to do:

• Make sure the file is executable: chmod +x script.py

• Use a shebang to let the kernel know what interpreter to use. The top line of the script should read:

  #!/usr/bin/python
  

  This assumes that your script will run with the default python. If you need a specific version, just specify in the shebang:

  #!/usr/bin/python2.7
  

Now you can type:

    ./script.py

if the script is in your current directory, or:

    script.py

if the location of the script happens to be in your PATH, or:

    path/to/script.py

otherwise.