2D arrays

Question 1

How would you create a 2D array using list comprehension in Python?

Answer 1

arr = [[0] * 4 for i in range(4)]

Question 2

True or False: arr = [[0] * 4] * 4 is a valid way to initialize a 2D array using list comprehension?

Answer 2

False - any change to this list will effect every value in the list at the same index