/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

0 vote202 views1 answer
Write cell output to file jupyter colab
Python
1 vote191 views1 answer
Remove consecutive duplicates python
Python
1 vote193 views1 answer
Keep the user logged in even though user changes password django
Python
0 vote209 views1 answer
Df.rename(index=str, columns={"A": "a", "C": "c"}) what does index=str means
Python
3 votes253 views1 answer
Access the value in settings django
Python Django
0 vote191 views2 answers
Palindrom python rekursiv
Python
1 vote270 views1 answer
Pyton count number of character in a word
Python
0 vote222 views1 answer
Import cmath python 3
Python
0 vote196 views1 answer
Deactivate pandas warning copy
Python
0 vote222 views1 answer
Rolling std dev of a pandas series
Python