/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

1 vote144 views1 answer
How to fix geometry of a window in tkinter
Python
11 votes141 views1 answer
How to upgrade 3.6 to 3.7 on linux
Python
0 vote149 views1 answer
How to write a program that interacts with the terminal
Python
0 vote146 views1 answer
Default python structure
Python
0 vote150 views1 answer
Python remove suffix
Python
2 votes140 views1 answer
How to split and keep delimiter at the same line in python
Python
3 votes172 views1 answer
Write binary file in python
Python
1 vote192 views1 answer
How to config your flask for gmail
Python Flask
0 vote155 views2 answers
Numpy round to nearest 5
Python
0 vote141 views1 answer
Python file hashlib
Python