Skip to content
Related Articles

Related Articles

Improve Article
Python – Filter Tuples with All Even Elements
  • Last Updated : 02 Sep, 2020

Given List of tuples, filter only those with all even elements.

Input : test_list = [(6, 4, 2, 8), (5, 6, 7, 6), (8, 1, 2), (7, )]
Output : [(6, 4, 2, 8)]
Explanation : Only 1 tuple with all even elements.

Input : test_list = [(6, 4, 2, 9), (5, 6, 7, 6), (8, 1, 2), (7, )]
Output : []
Explanation : No tuple with all even elements.

Method #1 : Using loop

In this, we iterate each tuple, and check for all even elements using % operator and if even one element is odd, tuple is flagged and not added in result list.



Python3




# Python3 code to demonstrate working of 
# Filter Tuples with All Even Elements
# Using loop
  
# initializing list
test_list = [(6, 4, 2, 8), (5, 6, 7, 6), (8, 0, 2), (7, )]
  
# printing original list
print("The original list is : " + str(test_list))
  
res_list = []
for sub in test_list:
    res = True 
      
    # check if all are even
    for ele in sub:
        if ele % 2 != 0:
            res = False
            break
    if res:
        res_list.append(sub)
  
# printing results
print("Filtered Tuples : " + str(res_list))
Output
The original list is : [(6, 4, 2, 8), (5, 6, 7, 6), (8, 0, 2), (7, )]
Filtered Tuples : [(6, 4, 2, 8), (8, 0, 2)]

Method #2 : Using all() + list comprehension

In this, the task of checking for all elements to be even is done using all(), and list comprehension is used for task of filtering post checking.

Python3




# Python3 code to demonstrate working of 
# Filter Tuples with All Even Elements
# Using all() + list comprehension
  
# initializing list
test_list = [(6, 4, 2, 8), (5, 6, 7, 6), (8, 0, 2), (7, )]
  
# printing original list
print("The original list is : " + str(test_list))
  
# testing for tuple to be even using all()
res = [sub for sub in test_list if all(ele % 2 == 0 for ele in sub)]
  
# printing results
print("Filtered Tuples : " + str(res))
Output
The original list is : [(6, 4, 2, 8), (5, 6, 7, 6), (8, 0, 2), (7, )]
Filtered Tuples : [(6, 4, 2, 8), (8, 0, 2)]

 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 :