Preloading the Jupyter Notebook with specific classes/functions

Question

I\'d like to preload a notebook with specific classes/functions that I\'ve defined in another file. More specifically, I\'d like to do this with python (something like loadi

Answer 1

When you start Jupyter notebook (or lab), if you have python script file(s) in

location_of_ipython_profile/startup/

then they will run on every IPython startup (to serve as standard ipython kernel). For example, on my machine I have a file named 00-first.py and it has simple content as follows:

import numpy as np

If there are other scripts, say, 50-middle.py and 99-last.py, they also run consecutively.

When I open a new Jupyter notebook with ipython kernel. I will have many thing pre-executed according to those script files. For the first script, 00-first.py, it provides the symbol np to use right away. So, I can run print(np.pi) and get 3.141592... as output.

To get the location_of_ipython_profile, one can run magic command on Jupyter notebook:

!ipython locate profile

In my case, I get C:\Users\swatc\.ipython\profile_default. To list all the files in the startup folder, I run:

!dir C:\Users\swatc\.ipython\profile_default\startup\*.*

Remember that there can be several python profiles on your computer. All the above is valid for the default profile.

Hope this helps.