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

0 vote54 views1 answer
Measure time
Python
1 vote59 views1 answer
Python import all words
Python
1 vote60 views3 answers
Does tuple allow duplicate values in python
Python
0 vote56 views1 answer
How to convert array to vector in python
Python
0 vote57 views1 answer
Bar Plot Seaborn with No Error Bars
Python
9 votes56 views2 answers
Python extract values that have different values in a column
Python
2 votes58 views5 answers
How to kill
Python
1 vote78 views1 answer
Django admin slug auto populate
Python Django
0 vote64 views1 answer
TemplateSyntaxError
Python
8 votes67 views2 answers
Python iterate backwards through list
Python