IPython: load extension automatically upon start

From the IPython documentation:

Using extensions

To load an extension while IPython is running, use the %load_ext magic:

In [1]: %load_ext myextension

To load it each time IPython starts, list it in your configuration file:

c.InteractiveShellApp.extensions = [
    'myextension'
]

Hope that helps

$ cat ~/.ipython/profile_default/startup/load_extensions.py
get_ipython().run_line_magic('load_ext', 'autoreload')