fMRI single subject ICA decomposition python based

I want to do a simple resting state ICA decomposition of single subjects that i can run from a python script. I saw in nilearn that you can do multi-subject ICA via CanICA. does it make sense to run canICA on a single subject? what are the alternatives to this?
any help will be appreciated

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CanICA runs on single-subject data, in which case it defaults to an ICA without group model.

How do you run CanICA for single subject instead of a group?
I need to run single-subject ICA and fsl has been difficult to implement.
Thanks for explaining