/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 vote189 views1 answer
Speak by a discord bot in python
Python
0 vote153 views1 answer
Python monitor directory for files count
Python
-1 vote145 views1 answer
Autopy python not installing
Python
1 vote134 views1 answer
Python region
Python
4 votes151 views2 answers
Create an array from 1 to n python
Python
19 votes136 views3 answers
Convert a list ['Pythons syntax is easy to learn', 'Pythons syntax is very clear'] to a string using ‘&’.
Python
0 vote142 views1 answer
Micropython button interrups
Python
0 vote141 views2 answers
Xgbboostclassifier model
Python
12 votes143 views2 answers
How to execute a python file from another python file
Python
4 votes106 views3 answers
Module 'tensorflow._api.v2.train' has no attribute 'gradientdescentoptimizer'
Python