Python 2d matrix declare

Create a 2d array in python

def build_matrix(rows, cols):
    matrix = []

    for r in range(0, rows):
        matrix.append([0 for c in range(0, cols)])

    return matrix

if __name__ == '__main__':
    build_matrix(6, 10)

2d array in python

from array import *

T = [[11, 12, 5, 2], [15, 6,10], [10, 8, 12, 5], [12,15,8,6]]
for r in T:
    for c in r:
        print(c,end = " ")
    print()

Source: tutorialspoint.com

2d array pytho

# 2D array that is 3x4 (3 columns, 4 rows)
# note that it is essentially an array of lists
arr = [
		[11, 12, 5],
        [15, 6, 10],
        [10, 8, 12],
        [12, 15, 8]
        ]

Python 2d matrix declare

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

Similar codes

2 votes336 views2 answers
Check multiple keys in python dict
Python
8 votes281 views2 answers
Path to create a text file in python
Python
1 vote342 views1 answer
ValueError: cannot mask with array containing NA / NaN values
Python
0 vote364 views1 answer
Python sns lable axes
Python
-1 vote407 views1 answer
What is admin.tabularinline django
Python Django
0 vote399 views1 answer
NameError Traceback (most recent call last) <ipython-input-36-28457fcc3f62> in <module> ----> 1 plt.bar(freqs.index, freqs.values, color = "green") 2 plt.show() NameError: name 'freqs' i
Python
0 vote333 views2 answers
Python get sub count from youtube
Python
68 votes387 views6 answers
Create directory in python
Python
0 vote336 views1 answer
Pygame boilerplate
Python
17 votes353 views2 answers
WARNING: You are using pip version 19.2.3, however version 21.2.4 is available.
Python