Python | Maximum element in tuple list

Sometimes, while working with data in form of records, we can have a problem in which we need to find the maximum element of all the records received. This is a very common application that can occur in Data Science domain. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using max() + generator expression
This is the most basic method to achieve solution to this task. In this, we iterate over whole nested lists using generator expression and get the maximum element using max().

# Python3 code to demonstrate working of 
# Maximum element in tuple list 
# using max() + generator expression 
  
# initialize list  
test_list = [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)] 
  
# printing original list  
print("The original list : " + str(test_list)) 
  
# Maximum element in tuple list 
# using max() + generator expression 
res = max(int(j) for i in test_list for j in i) 
  
# printing result 
print("The Maximum element of list is : " + str(res)) 

Output :

The original list : [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)]
The Maximum element of list is : 10

Method #2 : Using max() + map() + chain.from_iterable()
The combination of above methods can also be used to perform this task. In this, the extension of finding maximum is done by combination of map() and from_iterable().

# Python3 code to demonstrate working of 
# Maximum element in tuple list 
# using max() + map() + chain.from_iterable() 
from itertools import chain 
  
# initialize list  
test_list = [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)] 
  
# printing original list  
print("The original list : " + str(test_list)) 
  
# Maximum element in tuple list 
# using max() + map() + chain.from_iterable() 
res = max(map(int, chain.from_iterable(test_list))) 
  
# printing result 
print("The Maximum element of list is : " + str(res)) 

Output :

The original list : [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)]
The Maximum element of list is : 10

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