/Python/How to create one list from 2d list python

How to create one list from 2d list python

How to create 2d list in python

o=[]
for i in range(0,rows):
    x=[]
    for j in range(0,cols):
        x.append(0)
    o.append(x)
#if you use [[0]*cols]*rows all rows will become the same list
#so editing in one row will edit all rows

How to create one list from 2d list python

>>> l = [[1, 2, 3], [4, 5, 6], [7], [8, 9]]
>>> sum(l, [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]

Python declare 2d list

length, breadth = x, y
matrix = [[-1 for j in range(breadth)] for i in range(length)]
# every element is -1

Similar codes

2 votes209 views4 answers
Hack instagram account with python
Python
2 votes200 views1 answer
Is python easier than javascript
Python
3 votes202 views6 answers
Concatenate List
Python
0 vote206 views1 answer
Python read file delete first line
Python
0 vote199 views1 answer
Python web app with redis github
Python
1 vote244 views1 answer
Websocket communitation to another pc python
Python
2 votes204 views6 answers
How to download nltk in python
Python
1 vote223 views1 answer
Convert pandas dataframe to django queryset
Python Django
0 vote258 views2 answers
Avoid bad request django
Python Django
10 votes225 views3 answers
Python iterate through files
Python