dotfiles/notes/python/ipython_np.md
2023-12-23 20:13:52 -07:00

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Notes python and IPython

Python

Virtual envs

Virtual environments are the chroot and jails of python. They essentially temporarily append to the path and source locally installed versions of packages

$ python3 -m venv jail

Creates a new python in

$ source jail/bin/activate
$ deactivate

Start and stop the venv. The $PS1 should indicate which one is active

$ pip install numpy ipython

Installs latest versions of packages to the venv. Use pip not pip3 in venvs

IPython

For a full blown IDE experience in shell, you'll want to use the IPython REPL. Follow the vim ipython setup instructions to use it rStudio style

Magic in scripts

>>> from IPython import get_ipython
>>> get_ipython().magic('reset -f')

Functions exactly like typing %reset -f in the IPython interpreter. When sourcing entire files, percent magic syntax won't work

Graphical interface

For certain applications, such as plotting graphs, a gui becomes much more capable than a terminal. matplotlib can be easily set up to open a live-updating gui window controlled by ipython

>>> get_ipython.magic('pylab')
In [01]: %pylab

Starts up a gui for plots. It may not open until the first figure is created

[//]: # ex: set ft=markdown tw=80: