Skip to content
Related Articles

Related Articles

Improve Article
Python – Sort by Maximum digit in Element
  • Last Updated : 11 Oct, 2020

Given a List of Elements, sort by the maximum digit of the element present in the List.

Input : test_list = [234, 92, 8, 721] 
Output : [234, 721, 8, 92] 
Explanation : 4 < 7 < 8 < 9, sorted by maximum digits.

Input : test_list = [92, 8, 721] 
Output : [721, 8, 92] 
Explanation : 7 < 8 < 9, sorted by maximum digits. 

Method #1 : Using max() + sort()

In this, we perform task of inplace sort using sort() and maximum element is extracted using max().



Python3




# Python3 code to demonstrate working of 
# Sort by Maximum digit in Element
# Using max() + sort()
  
def max_dig(ele):
      
    # getting maximum digit by magnitude
    return max(str(ele))
  
# initializing list
test_list = [234, 92, 15, 8, 721]
  
# printing original list
print("The original list is : " + str(test_list))
  
# calling sort fnc. to sort with key
test_list.sort(key = max_dig)
  
# printing result 
print("Sorted List : " + str(test_list))
Output
The original list is : [234, 92, 15, 8, 721]
Sorted List : [234, 15, 721, 8, 92]

Method #2  : Using sorted() + lambda + max()

In this, we use sorted() perform non-inplace sort, and avoid usage of external function using lambda function to get maximum digit.

Python3




# Python3 code to demonstrate working of 
# Sort by Maximum digit in Element
# Using sorted() + lambda + max()
  
# initializing list
test_list = [234, 92, 15, 8, 721]
  
# printing original list
print("The original list is : " + str(test_list))
  
# lambda fnc. used to get maximum Element logic
res = sorted(test_list, key = lambda ele : max(str(ele)))
  
# printing result 
print("Sorted List " + str(res))
Output
The original list is : [234, 92, 15, 8, 721]
Sorted List [234, 15, 721, 8, 92]

 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. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course




My Personal Notes arrow_drop_up
Recommended Articles
Page :