[FIXED] How to replace the first element of every list in a list of lists?

Issue

How to replace the first value in a list of lists with a new value?

list_of_lists = [["a", "b", "c"], ["d", "e", "f"], ["g", "h", "i"]]

new_values = [1, 2, 3]

for i in list_of_lists:
    for n in range(len(new_values)):
        list_of_lists[n][0] = new_values[n]  

Desired output

list_of_lists = [[1, "b" ,"c"], [2, "e", "f"], [3, "h", "i"]]

Solution

This one is actually quite simple

list_of_lists = [['a', 'b', 'c'], ['d', 'e', 'f'], ['g', 'h', 'i']]
new_values = [1, 2, 3]  

for sub_list in list_of_lists:
    sub_list[0] = new_values.pop(0)

This iterates over the lists and removes the first value of new_values each time.

Answered By - Adam Luchjenbroers