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Get first element with maximum value in list of tuples in Python
We have a list of tuple. We are required to find out that tuple which was maximum value in it. But in case more than one tuple has same value we need the first tuple which has maximum value.
With itemgetter and max
With itemgetter(1) we get all the value from index position 1 and then apply a max function to get the item with max value. But in case more than one result is returned, we apply index zero to get the first tuple with maximum element in it.
Example
from operator import itemgetter
# initializing list
listA = [('Mon', 3), ('Tue', 20), ('Wed', 9)]
# Given list
print("Given list : \n" ,listA)
# using max() and itemgetter()
res = max(listA, key=itemgetter(1))[0]
# printing result
print("Day with maximum score is : \n",res)Output
Running the above code gives us the following result −
Given list :
[('Mon', 3), ('Tue', 20), ('Wed', 9)]
Day with maximum score is :
TueWith max and lambda
We use the lambda function to get the elements at index position 1 then apply the max function. Then we apply the index position 0 to get the first among multiple matches to get the final result.
Example
# initializing list
listA = [('Mon', 3), ('Tue', 20), ('Wed', 9)]
# Given list
print("Given list : \n" ,listA)
# using max() and lambda
res = max(listA, key = lambda i : i[1])[0]
# printing result
print("Day with maximum score is : \n",res)Output
Running the above code gives us the following result −
Given list :
[('Mon', 3), ('Tue', 20), ('Wed', 9)]
Day with maximum score is :
TueWith sorted
In this approach we use the sorted function with reversed equal to true condition when applying the lambda function.
Example
# initializing list
listA = [('Mon', 3), ('Tue', 20), ('Wed', 9)]
# Given list
print("Given list : \n" ,listA)
# using sorted() and lambda
res = sorted(listA, key = lambda i: i[1], reverse = True)[0][0]
# printing result
print("Day with maximum score is : \n",res)Output
Running the above code gives us the following result −
Given list :
[('Mon', 3), ('Tue', 20), ('Wed', 9)]
Day with maximum score is :
Tue
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