Confirming with 'y' is not defined when installing dependencies

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Thats a quick start and quick end lol, do I miss something?

Install/Update dependencies? Y/n: Y
Traceback (most recent call last):
File "mitmAP.py", line 48, in
update = input("[?] Install/Update dependencies? Y/n: ")
File "", line 1, in
NameError: name 'Y' is not defined

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This happens running the script using python instead of python3. My wrong.