How do I install a library permanently in Colab?

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Yes. You can install the library in Google Drive. Then add the path to sys.path.

import os, sys
from google.colab import drive
drive.mount('/content/drive')
nb_path="/content/notebooks"
os.symlink('/content/drive/My Drive/Colab Notebooks', nb_path)
sys.path.insert(0,nb_path)

Then you can install a library, for example, jdc, and specify the target.

!pip install --target=$nb_path jdc

Later, when you run the notebook again, you can skip the !pip install line. You can just import jdc and use it. Here’s an example notebook.

https://colab.research.google.com/drive/1KpMDi9CjImudrzXsyTDAuRjtbahzIVjq

BTW, I really like jdc‘s %%add_to. It makes working with a big class much easier.

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