if you try to use nested for loop in a list comprehension in python, wat

list_comprehension_wat.py

A = [1, 2, 3, 4]
B = ['a', 'b', 'c']

# saw this version on a Coursera Course
# If you actually use this crappy style, wat
print([a for b in B for a in A])

# Equivilant
result = []
for b in B:
    for a in A:
        result.append(a)
print(result)