IPython notebook: how to reload all modules in a specific Python file?

Question

I define many modules in a file, and add from myFile import * to the first line of my ipython notebook so that I can use it as dependency for other parts in this notebook.

Currently my workflow is:

1. modify myFile
2. restart the Ipython kernel
3. rerun all code in Ipython.

Does anyone know if there is a way to reload all modules in myFile without need to restart the Ipython kernel? Thanks!

Answer 1

From the ipython docs:

In [1]: %load_ext autoreload  In [2]: %autoreload 2  In [3]: from foo import some_function  In [4]: some_function() Out[4]: 42  In [5]: # open foo.py in an editor and change some_function to return 43  In [6]: some_function() Out[6]: 43 

You can also configure the auto reload to happen automatically by doing this: ipython profile create

and adding the following to ~/.config/ipython/profile_default/ipython_config.py

c.InteractiveShellApp.extensions = ['autoreload'] c.InteractiveShellApp.exec_lines = ['%autoreload 2'] c.InteractiveShellApp.exec_lines.append('print("Warning: disable autoreload in ipython_config.py to improve performance.")') 

Note: If you rename a function, you need to rerun your import statement

Answer 2

Use importlib!

import importlib importlib.reload(my_awesome_python_script) 

So when you do changes in your my_awesome_python_script in the backend, no need to restart the kernel or re-run the entire notebook again. Just re-run this cell. This is extremely useful if you did a lot of work on memory heavy datasets