Python | Maximize Record list

Sometimes, while working with Python records, we can have a problem in which we need to perform cross maximization 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()
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 maximization across lists is performed with help of zip().

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of
# Maximize Record list
# using list comprehension + zip()
  
# 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))
  
# Maximize Record list
# using list comprehension + zip()
res = [(max(x[0], y[0]), max(x[1], y[1])) for x, y in zip(test_list1, test_list2)]
  
# printing result
print("The Maximums across lists is : " + str(res))

chevron_right


Output :



The original list 1 : [(2, 4), (6, 7), (5, 1)]
The original list 2 : [(5, 4), (8, 10), (8, 14)]
The Maximums across lists is : [(5, 4), (8, 10), (8, 14)]

 

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

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of
# Maximize Record list
# using max() + 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))
  
# Maximize Record list
# using max() + zip() + map()
res = [tuple(map(max, zip(a, b))) for a, b in zip(test_list1, test_list2)]
  
# printing result
print("The maximums across lists is : " + str(res))

chevron_right


Output :

The original list 1 : [(2, 4), (6, 7), (5, 1)]
The original list 2 : [(5, 4), (8, 10), (8, 14)]
The Maximums across lists is : [(5, 4), (8, 10), (8, 14)]



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.