Tutorial Index

Part 9c

Libraries

Using Custom Modules in Python

Keeping your file system clean and managable is easy to do in Python.

Move myclass.py to a subdirectory and call it lib. Create an empty file in the lib subdirectory named __init__.py. Delete myclass.pyc. Now you only have one file in your main directory and all your modules are in a sub directory. Rename glade9b.py to glade9c.py.

Now change the import line in glade9c.py to add the subdirectory like so:

import lib.myclass as mc

Now from a terminal run glade9c.py again and you will see the following.

john@zotac:~/glade9c$ ./glade9c.py
calling printif with an argument
This was passed to printit
calling printit with no argument
No Argument Passed