[Python] Looping through a list and assigning values has no effect [duplicate]

I have a list and want to change its elements

list = ['apple','potato']


Now, while this works

for i in range(list):
list = list.capitalize()


this one doesn't and I just don't get why

for i in list:
i = i.capitalize()


I'm new to Python, my only background is C++ so I'm still trying to adapt to Python's style.

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