/Python/How to create an empty 2d list in python

How to create an empty 2d list in python

#To create an empty 2d list of size n
l=[]
for i in range(n):
	l.append([])
#To create an 2d list of size rows and columns
l=[[0 for j in range(len(column))]for i in range(len(row))]

2d array python initialize

>>> b = [['a']*3]*3
>>> b
[['a', 'a', 'a'], ['a', 'a', 'a'], ['a', 'a', 'a']]
>>> b[1][1]
'a'
>>> b[1][1] = 'b'
>>> b
[['a', 'b', 'a'], ['a', 'b', 'a'], ['a', 'b', 'a']]

Source: stackoverflow.com

Similar codes

0 vote111 views1 answer
Python string equals
Python
2 votes135 views3 answers
Django queryset to list
Python Django
7 votes107 views2 answers
Make pandas df from np array
Python
0 vote109 views1 answer
Mastermind
Python
5 votes133 views4 answers
Get user django
Python Django
4 votes138 views3 answers
Python get int from string
Python
2 votes115 views4 answers
Pandas difference between two dataframes
Python
0 vote116 views1 answer
Python () vs [] vs {\
Python
0 vote102 views1 answer
Python how to dump exception stak
Python
0 vote121 views1 answer
Python mark function as no return
Python