/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 vote300 views1 answer
Selenium save webpage as pdf python
Python
1 vote301 views1 answer
Object literal python
Python
0 vote317 views1 answer
How to do a dark theam in pycgram
Python
1 vote308 views1 answer
Values outside range pandas
Python
3 votes333 views2 answers
Python list multiplication
Python
8 votes300 views2 answers
Reverse python script
Python
0 vote360 views1 answer
Clear output alternative for visual studio code in python
Python
0 vote308 views1 answer
Python get all items from generator
Python
41 votes324 views3 answers
Python - sort dictionary by value
Python
0 vote347 views1 answer
Change order of headers pandas
Python