Related Articles

Related Articles

Python – Alternate Minimum element in list
  • Last Updated : 27 Feb, 2020

Some of the list operations are quite general and having shorthands without needing to formulate a multiline code is always required. Wanting to construct the list consisting of all the alternate elements of the original list is a problem that one developer faces in day-day applications and sometimes require to find minimum of these alternate elements. Lets discuss certain ways in which this can be performed.

Method #1 : Using list comprehension + min()
Shorthand to the naive method, list comprehension provides a faster way to perform this particular task. In this method, all the indices which are not multiple of 2, hence odd are inserted in the new list. Then the minimum is extrated using min().

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python code to demonstrate 
# Alternate elements Minimimum
# using list comprehension + min()
  
# initializing list 
test_list = [1, 4, 6, 7, 9, 3, 5]
  
# printing original list 
print ("The original list : " + str(test_list))
  
# using list comprehension + min()
# Alternate elements Minimimum
res = min([test_list[i] for i in range(len(test_list)) if i % 2 != 0])
  
# printing result 
print ("The alternate element list minimum is : " + str(res))

chevron_right


Output :

The original list : [1, 4, 6, 7, 9, 3, 5]
The alternate element list minimum is : 3

 

Method #2 : Using enumerate() + min()
This is just a variation to the list comprehension method but does the similar internal working as list comprehension but uses different variables to keep track of index along with its value. Then the minimum is extrated using min().



filter_none

edit
close

play_arrow

link
brightness_4
code

# Python code to demonstrate 
# Alternate elements Minimimum
# using enumerate() + min()
  
# initializing list 
test_list = [1, 4, 6, 7, 9, 3, 5]
  
# printing original list 
print ("The original list : " + str(test_list))
  
# using enumerate() + min()
# Alternate elements Minimimum
res = min([i for j, i in enumerate(test_list) if j % 2 != 0])
  
# printing result 
print ("The alternate element list minimum is : " + str(res))

chevron_right


Output :

The original list : [1, 4, 6, 7, 9, 3, 5]
The alternate element list minimum is : 3

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.




My Personal Notes arrow_drop_up
Recommended Articles
Page :