Element-wise "multiplication" of two lists with different type

Question

How to perform element wise "multiplication" between a list of strings and a list of boolean values?

For example if i have the following lists :

list_1=['A','B','C','D']

list_2=[True,False,True,False]

Expected output is :

list_output==['A','','C','']

Wherever there is True the string are maintained, and wherever there is False the string are replaced by empty string ('')

Answer 1

You can actually directly multiply corresponding elements after zipping the two lists since True is equivalent to 1 and False to 0. Multiplying a string by an integer repeats it that number of times.

res = [x * y for x, y in zip(list_1, list_2)]