How to make a continuous alphabetic list python (from a-z then from aa, ab, ac etc)

Question

I would like to make a alphabetical list for an application similar to an excel worksheet.

A user would input number of cells and I would like to generate list. For

Answer 1

Print the set of xl cell range of lowercase and uppercase charterers

Upper_case:

from string import ascii_uppercase
import itertools
def iter_range_strings(start_colu):
    for size in itertools.count(1):
        for string  in itertools.product(ascii_uppercase, repeat=size):
            yield "".join(string)

input_colume_range = ['A', 'B']
input_row_range= [1,2]
for row in iter_range_strings(input_colume_range[0]):
    for colum in range(int(input_row_range[0]), int(input_row_range[1]+1)):
        print(str(row)+ str(colum))
    if row ==  input_colume_range[1]:
        break

Result:

A1
A2
B1
B2