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Python | Maximize alternate element List
  • Last Updated : 29 Dec, 2019

The problem of getting maximum of a list is quite generic and we might some day face the issue of getting the maximum of alternate elements and get the list of 2 elements containing maximum of alternate elements. Let’s discuss certain ways in which this can be performed.

Method #1 : Using list comprehension + list slicing + max()
List slicing clubbed with list comprehension can be used to perform this particular task. We can have list comprehension to get run the logic and list slicing can slice out the alternate character, maximize by the max function.




# Python3 code to demonstrate
# Maximize alternate element List
# using list comprehension + list slicing + max()
  
# initializing list 
test_list = [2, 1, 5, 6, 8, 10]
  
# printing original list 
print("The original list : " + str(test_list))
  
# using list comprehension + list slicing + max()
# Maximize alternate element List
res = [max(test_list[i : : 2]) for i in range(len(test_list) // (len(test_list)//2))]
  
# print result
print("The alternate elements maximum list : " + str(res))


Output :

The original list : [2, 1, 5, 6, 8, 10]
The alternate elements maximum list : [8, 10]

 

Method #2 : Using loop
This is the brute method to perform this particular task in which we have the maximum of alternate elements in different element indices and then return the output list.






# Python3 code to demonstrate
# Maximize alternate element List
# using loop
  
# initializing list 
test_list = [2, 1, 5, 6, 8, 10]
  
# printing original list 
print("The original list : " + str(test_list))
  
# using loop
# Maximize alternate element List
res = [0, 0]
for i in range(0, len(test_list)):
    if(i % 2):
        res[1] = max(res[1], test_list[i])
    else :
        res[0] = max(res[0], test_list[i])
  
# print result
print("The alternate elements maximum list : " + str(res))


Output :

The original list : [2, 1, 5, 6, 8, 10]
The alternate elements maximum list : [8, 10]

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