GitLab

* image_processor.py: Fixed an error in ValueError's message , as the string's join method tried to join types, instead of strings

Bug that occurred:

f"Input is in incorrect format. Currently, we only support {', '.join(supported_formats)}"
TypeError: sequence item 0: expected str instance, type found

* Fixed: C417 Unnecessary `map` usage (rewrite using a generator expression)

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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>