/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

4 votes284 views1 answer
Python manage.py runserver
Python
0 vote253 views2 answers
Video to text python
Python
0 vote289 views2 answers
Sns histplot change legend labels
Python
0 vote305 views1 answer
Get false positives from confusoin matrix
Python
11 votes288 views3 answers
How to get the length of a string in python
Python
-2 votes293 views1 answer
No connection could be made because the target machine actively refused it python
Python
7 votes306 views1 answer
How to find the location of a character in a string in python
Python
1 vote300 views1 answer
Update xls file using python
Python
0 vote298 views2 answers
Python play mp3 in background
Python
117 votes323 views6 answers
Python how to get user input
Python