How to take 2d array input in Python?

Question

Can anyone explain how to take 2d array input in Python?

Answer 1

There are multiple ways to take 2d array input in Python. Here I have mentioned the basic to take 2d array input:

n_rows= int(input("Number of rows:"))

n_columns = int(input("Number of columns:"))

#Define the matrix

matrix = [ ]

print("Enter the entries row-wise:")

#for user input

for i in range(n_rows):          # A for loop for row entries

    a =[ ]

    for j in range(n_cols):      # A for loop for column entries

         a.append(int(input()))

    matrix.append(a)

  

#To print the matrix

for i in range(n_rows):

    for j in range(n_cols):

        print(matrix[i][j], end = " ")

    print( )

Output:

Enter the number of rows:2

Enter the number of columns:3

Enter the entries rowwise:

3

4

5

6

7

8

3 4 5

6 7 8

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Comments

The code is not working properly. Change the second line to:
n_cols = int(input("Number of columns:"))

Answer 2

If you want to read 2D arrays in Python, this is the easiest way to do it: 

# Input the dimensions 

rows = int(input("Enter number of rows: ")) 

array_2d = [] 

# Accept each row 

for _ in range(rows): 

    row = list(map(int, input("Enter elements of the row, separated by spaces:        ").split())) 

    array_2d.append(row) 

# Print the 2D array 

print("The 2D array is:") 

for row in array_2d: 

print(row) 

Input Rows: Number of rows you need

Input Elements: Each row elements separated by space. 

Store and Print: The elements will be stored in a list that is printed as 2D array. It is pretty straightforward and should help you just fine. Feel free to hear from you again if you have more questions!