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Python | List of tuples Minimum

  • Last Updated : 30 Jan, 2020

Sometimes, while working with Python records, we can have a problem in which we need to perform cross minimum of list of tuples. This kind of application is popular in web development domain. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using list comprehension + zip() + min()
The combination of above functionalities can be used to perform this particular task. In this, we iterate through the list using list comprehension and the minimum across lists is performed with help of zip(). The minimum is performed using min().




# Python3 code to demonstrate working of
# List of tuples Minimum
# using list comprehension + zip() + min()
  
# initialize lists
test_list1 = [(2, 4), (6, 7), (5, 1)]
test_list2 = [(5, 4), (8, 10), (8, 14)]
  
# printing original lists
print("The original list 1 : " + str(test_list1))
print("The original list 2 : " + str(test_list2))
  
# List of tuples Minimum
# using list comprehension + zip() + min()
res = [(min(x[0], y[0]), min(x[1], y[1])) for x, y in zip(test_list1, test_list2)]
  
# printing result
print("The Minimum across lists is : " + str(res))
Output :
The original list 1 : [(2, 4), (6, 7), (5, 1)]
The original list 2 : [(5, 4), (8, 10), (8, 14)]
The Minimum across lists is : [(2, 4), (6, 7), (5, 1)]

 

Method #2 : Using min() + zip() + map()
This is yet another way to perform this task. This is similar to above method, the difference is that minimum is performed by inbuilt function and extending logic to each element is done by map().






# Python3 code to demonstrate working of
# List of tuples Minimum
# using min() + zip() + map()
  
# initialize lists
test_list1 = [(2, 4), (6, 7), (5, 1)]
test_list2 = [(5, 4), (8, 10), (8, 14)]
  
# printing original lists
print("The original list 1 : " + str(test_list1))
print("The original list 2 : " + str(test_list2))
  
# List of tuples Minimum
# using min() + zip() + map()
res = [tuple(map(min, zip(a, b))) for a, b in zip(test_list1, test_list2)]
  
# printing result
print("The Minimum across lists is : " + str(res))
Output :
The original list 1 : [(2, 4), (6, 7), (5, 1)]
The original list 2 : [(5, 4), (8, 10), (8, 14)]
The Minimum across lists is : [(2, 4), (6, 7), (5, 1)]

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