Python | Minimum 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 minimum 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 min() + 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 minimum element using min().



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# Python3 code to demonstrate working of
# Minimum element in tuple list
# using min() + 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))
  
# Minimum element in tuple list
# using min() + generator expression
res = min(int(j) for i in test_list for j in i)
  
# printing result
print("The Minimum element of list is : " + str(res))

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Output :

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

 

Method #2 : Using min() + map() + chain.from_iterable()

The combination of above methods can also be used to perform this task. In this, the extension of finding minimum is done by combination of map() and from_iterable().

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# Python3 code to demonstrate working of
# Minimum element in tuple list
# using min() + 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))
  
# Minimum element in tuple list
# using min() + map() + chain.from_iterable()
res = min(map(int, chain.from_iterable(test_list)))
  
# printing result
print("The Minimum element of list is : " + str(res))

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Output :

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


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