Syntax error Get maximum of Nth column from tuple list in Python

Get maximum of Nth column from tuple list in Python

When it is required to get the maximum of 'N'th column from a list of tuples, it can be done using list comprehension and 'max' method.

The list comprehension is a shorthand to iterate through the list and perform operations on it. The 'max' method returns the maximum of values among an iterable.

A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).

A list of tuple basically contains tuples enclosed in a list.

Below is a demonstration of the same −

Example

Live Demo

my_list = [( 67, 78, 39), (34, 23, 52), (99, 69, 78), (2, 11, 0)]

print ("The list is : " )
print(my_list)
N = 2
print("The value of 'N' has been initialized")

my_result = max([sub[N] for sub in my_list])

print("The maximum of Nth column in the list of tuples is : " )
print(my_result)

Output

The list is :
[(67, 78, 39), (34, 23, 52), (99, 69, 78), (2, 11, 0)]
The value of 'N' has been initialized
The maximum of Nth column in the list of tuples is :
78

Explanation

  • A list of tuples is defined, and displayed on the console.
  • The value of 'N' is initialized.
  • The list of tuples is iterated through, using list comprehension, and the 'amx' method is used to get the maximum value from the list of tuples.
  • This operation is assigned a variable.
  • This variable is the output that is displayed on the console.
Updated on: 2021-03-11T09:33:11+05:30

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