Flatten 2D list in Python

0 votes
I have a 2D list in python. How do I flatten the list?
Jun 11 in Python by Varsha
20 views

1 answer to this question.

0 votes

Here's an example for you:

mat = [[10, 20, 30, 40], [50, 60, 70, 80], [90, 100, 110, 120]]
flatlist = []
for sublist in mat:
   for item in sublist:
      flatlist.append(item)
print (flatlist)

Suppose you have a 2D list called mat, all you've to do is, crawl through the list elements and flatten the list by appending the list items one after the other.

answered Jun 11 by Adi

Related Questions In Python

+4 votes
7 answers

Splitting a List into chunks in Python

Here's a generator that yields the chunks ...READ MORE

answered Apr 13, 2018 in Python by Nietzsche's daemon
• 4,260 points
3,062 views
+1 vote
4 answers

Count the frequency of an item in a python list

To count the number of appearances: from collections ...READ MORE

answered Oct 18, 2018 in Python by tinitales
162 views
0 votes
1 answer

How can I convert a list of dictionaries from a CSV into a JSON object in Python?

You could try using the AST module. ...READ MORE

answered Apr 17, 2018 in Python by anonymous
552 views
+2 votes
11 answers

How to print array/ list without brackets in python?

name=["a","b","c"] print (', '.join(name)) It will simply take all ...READ MORE

answered Apr 18, 2018 in Python by aayushi
• 750 points
16,476 views
+1 vote
2 answers

how can i count the items in a list?

Syntax :            list. count(value) Code: colors = ['red', 'green', ...READ MORE

answered Jul 6 in Python by Neha
• 330 points

edited Jul 8 by Kalgi 132 views
+4 votes
6 answers
+1 vote
1 answer

How can I reverse list in Python?

Reversing a list is a commonly used ...READ MORE

answered May 13 in Python by Taj
• 920 points
27 views
0 votes
1 answer

Is there a way to list out in-built variables and functions of Python?

The in-built variables and functions are defined ...READ MORE

answered May 14 in Python by Junaid
26 views