How to create 2d list in python

o=[]
for i in range(0,rows):
    x=[]
    for j in range(0,cols):
        x.append(0)
    o.append(x)
#if you use [[0]*cols]*rows all rows will become the same list
#so editing in one row will edit all rows

Python initialize a 2d array

x = [[foo for i in range(10)] for j in range(10)]
# x is now a 10x10 array of 'foo' (which can depend on i and j if you want)

Source: stackoverflow.com

How to create one list from 2d list python

>>> l = [[1, 2, 3], [4, 5, 6], [7], [8, 9]]
>>> sum(l, [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]

2d list in python

def list_2D(r, c):
    l = []
    for i in range(r):
        x = [0] * c
        l.append(x)
    return l

Similar codes

8 votes130 views1 answer
Input stdin python
Python
0 vote135 views1 answer
Simple Kivy pong game
Python
42 votes161 views3 answers
Python get command line arguments
Python
1 vote131 views1 answer
How to create a cube in ursina
Python
0 vote147 views1 answer
Pandas description of dataframe renaming column values
Python
14 votes162 views1 answer
Create data dir in python
Python
3 votes133 views1 answer
Sort a list by values of another one python
Python
0 vote138 views3 answers
Django add user to group
Python
1 vote130 views1 answer
Python repeating scheduler
Python
0 vote176 views1 answer
How to remove explicit string concatenation
Python