Given a List of elements, get all elements with factors less than K.
Examples:
Input : test_list = [60, 12, 100, 17, 18, 19]. K = 4
Output : [17, 19]
Explanation : Both elements have 2 factors.Input : test_list = [60, 12, 100, 360, 18, 900]. K = 4
Output : []
Explanation : All have greater than 4 factors.
Method #1: Using list comprehension
In this, we use list comprehension to get factors count, and other list comprehension to iterate for all the elements in list.
Python3
# Python3 code to demonstrate working of # Elements with factors less than K # Using list comprehension def factors_less_k(ele, K): # comparing for factors return len([idx for idx in range(1, ele + 1) if ele % idx == 0]) <= K # initializing list test_list = [60, 12, 100, 17, 18] # printing original list print("The original list is : " + str(test_list)) # initializing K K = 4 # checking for each element res = [ele for ele in test_list if factors_less_k(ele, K)] # printing result print("Filtered elements : " + str(res)) |
The original list is : [60, 12, 100, 17, 18] Filtered elements : [17]
Method #2 : Using filter() + lambda + len() + list comprehension
In this, task of filtering is done using filter() and lambda, len(), and list comprehension is used to perform tasks of getting factors.
Python3
# Python3 code to demonstrate working of # Elements with factors less than K # Using filter() + lambda + len() + list comprehension def factors_less_k(ele, K): # comparing for factors return len([idx for idx in range(1, ele + 1) if ele % idx == 0]) <= K # initializing list test_list = [60, 12, 100, 17, 18] # printing original list print("The original list is : " + str(test_list)) # initializing K K = 4 # filtering using filter() + lambda res = list(filter(lambda ele: factors_less_k(ele, K), test_list)) # printing result print("Filtered elements : " + str(res)) |
The original list is : [60, 12, 100, 17, 18] Filtered elements : [17]
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.
