How to replace multiple forward slashes in a directory by a single slash?

Use os.path.abspath or normpath to canonicalise the path:

>>> import os.path
>>> os.path.abspath('/home//user////document/test.jpg')
'/home/user/document/test.jpg'

Solution:
This code snippet should solve your issue:

import re
x = '/home//user////document/test.jpg'
re.sub('/+','/', x)

Output:

'/home/user/document/test.jpg'

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