/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

14 votes139 views6 answers
How to print hello world in python
Python
78 votes146 views6 answers
Main python
Python
-1 vote141 views1 answer
Popup window python tkinter
Python
7 votes149 views2 answers
Python string to array
Python
0 vote140 views1 answer
How to get all links from a google search using python
Python
9 votes162 views1 answer
Sleep in python 3
Python
0 vote151 views1 answer
Python f-string format date
Python
1 vote142 views1 answer
Pytho list items to int
Python
0 vote141 views1 answer
Convert matplotlib figure to cv2 image
Python
5 votes144 views2 answers
How to set interval in python
Python