Python – Row with Maximum Record Element
Sometimes, while working with Python Records, we can have a problem in which we need to find the row with maximum record element. This kind of problem can come in domains of web development and day-day programming. Let’s discuss certain ways in which this task can be performed.
Input : test_list = [[(70, 4), (6, 7)], [(15, 2), (19, 3)]]
Output : [(70, 4), (6, 7)]Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
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Input : test_list = [[(20, 4)], [(15, 2)], [(34, 6)]]
Output : [(34, 6)]
Method #1 : Using max() + key
The combination of above functions can be used to solve this problem. In this, we extract maximum row using max() and key is used to check for initial element of records.
# Python3 code to demonstrate working of # Row with Maximum Record Element# Using max() + key # initializing listtest_list = [[(12, 4), (6, 7)], [(15, 2), (19, 3)], [(18, 3), (12, 4)], [(17, 1), (11, 3)]] # printing original listprint("The original list is : " + str(test_list)) # Row with Maximum Record Element# Using max() + keyres = max(test_list, key = max) # printing result print("The row with Maximum Value : " + str(res)) |
The original list is : [[(12, 4), (6, 7)], [(15, 2), (19, 3)], [(18, 3), (12, 4)], [(17, 1), (11, 3)]]
The row with Maximum Value : [(15, 2), (19, 3)]
Method #2 : Using max() + itemgetter()
This is yet another way to solve this problem. This approach provides flexibility to make a choice on element index for comparison, rather than just initial as in above method by the usage of itemgetter().
# Python3 code to demonstrate working of # Row with Maximum Record Element# Using max() + itemgetter()from operator import itemgetter # initializing listtest_list = [[(12, 4), (6, 7)], [(15, 2), (19, 3)], [(18, 3), (12, 4)], [(17, 1), (11, 3)]] # printing original listprint("The original list is : " + str(test_list)) # Row with Maximum Record Element# Using max() + itemgetter()res = max(test_list, key = itemgetter(1)) # printing result print("The row with Maximum Value : " + str(res)) |
The original list is : [[(12, 4), (6, 7)], [(15, 2), (19, 3)], [(18, 3), (12, 4)], [(17, 1), (11, 3)]]
The row with Maximum Value : [(15, 2), (19, 3)]
