/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 vote255 views1 answer
Which function is used to read single line from file?
Python
0 vote274 views1 answer
How to show pandas last record
Python
0 vote280 views2 answers
How to read excel with multiple pages on pandas
Python
3 votes278 views2 answers
Python script that executes at time
Python
6 votes316 views6 answers
Change date format python
Python
4 votes294 views4 answers
Distribution plot python
Python
2 votes333 views1 answer
Django static media
Python Django
1 vote267 views1 answer
Python head function show all columns
Python
0 vote300 views2 answers
Install cairo python
Python
3 votes270 views3 answers
Pandas sum group by
Python