Python map function to find the row with the maximum number of 1’s

PythonServer Side ProgrammingProgramming

In this tutorial, we are going to write a program which finds a row with a maximum number of 1's from a matrix using the map function.

Let's say we have the following matrix.

matrix = [ [0, 0, 1], [1, 1, 1], [1, 1, 0] ]

We can write a program in different ways. But, using map function, we will follow the below procedure.

  • Initialise the matrix.
  • Find the number of 1's in every row using map function. Store them in a list.
  • Print the max from the list.


## initializing the matrix
matrix = [
   [0, 0, 1],
   [1, 1, 1],
   [1, 1, 0]
## function to find number of 1's in a row
def number_of_ones(row):
   count = 0
   for i in row:
      if i is 1:
         count += 1
   return count
## finding the number of 1's in every row
## map returns an object which we converted into a list 
ones_count = list(map(number_of_ones, matrix))
## printing the index of max number from the list 


If you run the above program, you will get the following result.


If you have any doubts regarding the program, please do mention them in the comment section.

Published on 27-Aug-2019 15:13:03