A level above configuration are IPython extensions, Python modules which modify the behaviour of the shell. They are referred to by an importable module name, and can be placed anywhere you'd normally import from, or in .ipython/extensions/
.
A few important extensions are bundled with IPython <bundled_extensions>
. Others can be found on the extensions index on the wiki, and the Framework :: IPython tag on PyPI.
Extensions on PyPI can be installed using pip
, like any other Python package. Other simple extensions can be installed with the %install_ext
magic. The latter does no validation, so be careful using it on untrusted networks like public wifi.
To load an extension while IPython is running, use the %load_ext
magic:
ipython
In [1]: %load_ext myextension
To load it each time IPython starts, list it in your configuration file:
c.InteractiveShellApp.extensions = [
'myextension'
]
An IPython extension is an importable Python module that has a couple of special functions to load and unload it. Here is a template:
# myextension.py
def load_ipython_extension(ipython):
# The `ipython` argument is the currently active `InteractiveShell`
# instance, which can be used in any way. This allows you to register
# new magics or aliases, for example.
def unload_ipython_extension(ipython):
# If you want your extension to be unloadable, put that logic here.
This load_ipython_extension
function is called after your extension is imported, and the currently active ~IPython.core.interactiveshell.InteractiveShell
instance is passed as the only argument. You can do anything you want with IPython at that point.
load_ipython_extension
will be called again if you load or reload the extension again. It is up to the extension author to add code to manage that.
Useful InteractiveShell
methods include ~IPython.core.interactiveshell.InteractiveShell.register_magic_function
, ~IPython.core.interactiveshell.InteractiveShell.push
(to add variables to the user namespace) and ~IPython.core.interactiveshell.InteractiveShell.drop_by_id
(to remove variables on unloading).
defining_magics
You can put your extension modules anywhere you want, as long as they can be imported by Python's standard import mechanism. However, to make it easy to write extensions, you can also put your extensions in extensions/
within the IPython directory <ipythondir>
. This directory is added to sys.path
automatically.
When your extension is ready for general use, please add it to the extensions index. We also encourage you to upload it to PyPI and use the Framework :: IPython
classifier, so that users can install it with standard packaging tools.
autoreload cythonmagic octavemagic rmagic storemagic sympyprinting