Skip to content
Related Articles

Related Articles

Python | Filter tuples according to list element presence
  • Last Updated : 11 Nov, 2019

Sometimes, while working with records, we can have a problem in which we have to filter all the tuples from a list of tuples, which contains atleast one element from a list. This can have application in many domains working with data. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using list comprehension
Using list comprehension is brute force method to perform this task in a shorthand. In this, we just check for each tuple and check if it contains any element from the target list.

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of
# Filter tuples according to list element presence
# using list comprehension
  
# initialize list of tuple
test_list = [(1, 4, 6), (5, 8), (2, 9), (1, 10)]
  
# initialize target list 
tar_list = [6, 10]
  
# printing original tuples list
print("The original list : " + str(test_list))
  
# Filter tuples according to list element presence
# using list comprehension
res = [tup for tup in test_list if any(i in tup for i in tar_list)]
  
# printing result
print("Filtered tuple from list are : " + str(res))

chevron_right


Output :

The original list : [(1, 4, 6), (5, 8), (2, 9), (1, 10)]
Filtered tuple from list are : [(1, 4, 6), (1, 10)]

 

Method #2 : Using set() + list comprehension
Above approach can be optimized by converting the containers to a set() reducing duplicates and performing a & operation to fetch the desired records.



filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of
# Filter tuples according to list element presence
# using set() + list comprehension
  
# initialize list of tuple
test_list = [(1, 4, 6), (5, 8), (2, 9), (1, 10)]
  
# initialize target list 
tar_list = [6, 10]
  
# printing original tuples list
print("The original list : " + str(test_list))
  
# Filter tuples according to list element presence
# using set() + list comprehension
res = [tup for tup in test_list if (set(tar_list) & set(tup))]
  
# printing result
print("Filtered tuple from list are : " + str(res))

chevron_right


Output :

The original list : [(1, 4, 6), (5, 8), (2, 9), (1, 10)]
Filtered tuple from list are : [(1, 4, 6), (1, 10)]

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 :