Python: fastest way to create a list of n lists

Question

So I was wondering how to best create a list of blank lists:

[[],[],[]...]

Because of how Python works with lists in memory, this doesn\'t

Answer 1

To create list and list of lists use below syntax

     x = [[] for i in range(10)]

this will create 1-d list and to initialize it put number in [[number] and set length of list put length in range(length)

• To create list of lists use below syntax.

    x = [[[0] for i in range(3)] for i in range(10)]

this will initialize list of lists with 10*3 dimension and with value 0

• To access/manipulate element

    x[1][5]=value