„Do pętli” z dwiema zmiennymi?

Jak mogę uwzględnić dwie zmienne w tej samejfor pętla?

t1 = [a list of integers, strings and lists]
t2 = [another list of integers, strings and lists]

def f(t):  #a function that will read lists "t1" and "t2" and return all elements that are identical
    for i in range(len(t1)) and for j in range(len(t2)):
        ...

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