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

1 vote200 views1 answer
Palindrome Check using for loop in python
Python
2 votes196 views1 answer
Flask make static directory
Python
1 vote221 views1 answer
How to convert tuple into list in python
Python
1 vote191 views1 answer
Procfile flask
Python
0 vote249 views1 answer
Django connect to a db on heroku
Python Django
0 vote185 views1 answer
Math expressions with matplotlib
Python
3 votes196 views3 answers
Convert all columns to float pandas
Python
0 vote224 views1 answer
What should I do when the keras image datagenerato is nit working
Python
0 vote205 views1 answer
Python size of linked list
Python
49 votes221 views6 answers
How to create dataframe in python
Python