fix(python): add 'split' to reflexive methods

[elsapet]

Description

Add split to Python's reflexive methods so that, for example, we still consider the following as user input

url = sys.argv[2]
filename = url.split('/')[-1] # still user input

Checklist

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• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.