I am working on a medium sized python (2.7) project with multiple files I import. I have one main python file which starts the program. Other files contain class definitions, functions, etc.
I was wondering if I should put the shebang line in every python file or only the one I run in order to start my program?
Only files which you will execute by invoking them directly require the shebang. Small hint: if a file contains
if __name__ == "__main__":
main()
it is better (to stick with the Least Astonishment principle) to start it with a shebang. Make sure to have that shebang robust; rather have
#!/usr/bin/env python
than
#!/usr/bin/python
Many module files contain a main method used to start tests, so many module files start with a shebang.