Maximum Value in Record List as Tuple Attribute in Python

When it is required to find the maximum value in a record list of tuples, the list comprehension and the 'max' methods can be used.

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. The list comprehension is a shorthand to iterate through the list and perform operations on it.

The 'max' method can be used to find the maximum of all the elements in an iterable.

Below is a demonstration of the same −

Example

Live Demo

my_list = [('Will', [67, 45, 89]), ('Jam', [34, 56,13]), ('Pow', [99, 123, 89]), ('Nyk', [0, 56, 5])]

print ("The list of tuples is : " )
print(my_list)

my_result = [(key, max(lst)) for key, lst in my_list]

print ("The maximum of list tuple attribute is : " )
print(my_result)

Output

The list of tuples is :
[('Will', [67, 45, 89]), ('Jam', [34, 56, 13]), ('Pow', [99, 123, 89]), ('Nyk', [0, 56, 5])]
The maximum of list tuple attribute is :
[('Will', 89), ('Jam', 56), ('Pow', 123), ('Nyk', 56)]

Explanation

• A list of tuples is defined, and is displayed on the console.
• The list comprehension is used to iterate through the list, and the maximum of the values in the tuple (inside the list of tuple) is obtained.
• This operation's result is assigned to a variable.
• It is then displayed on the console as the output.