Sometimes, while working with Python tuples, we can have a problem in which we need to add all the elements of a particular list to all tuples of a list. This kind of problem can come in domains such as web development and day-day programming. Let’s discuss certain ways in which this task can be done.
Input : test_list = [(5, 6), (2, 4), (5, 7), (2, 5)], sub_list = [5, 4]
Output : [(5, 6, 5, 4), (2, 4, 5, 4), (5, 7, 5, 4), (2, 5, 5, 4)]Input : test_list = [(5, 6), (2, 4), (5, 7), (2, 5)], sub_list = [5]
Output : [(5, 6, 5), (2, 4, 5), (5, 7, 5), (2, 5, 5)]
Method #1 : Using list comprehension + "+" operator
The combination of above functionalities can be used to solve this problem. In this, we perfrom task of adding tuple to list using “+” operator and iteration over all tuples is done using list comprehension.
# Python3 code to demonstrate working of # Add list elements to tuples list# Using list comprehension + "+" operator # initializing listtest_list = [(5, 6), (2, 4), (5, 7), (2, 5)] # printing original listprint("The original list is : " + str(test_list)) # initializing list sub_list = [7, 2, 4, 6] # Add list elements to tuples list# Using list comprehension + "+" operatorres = [sub + tuple(sub_list) for sub in test_list] # printing result print("The modified list : " + str(res)) |
The original list is : [(5, 6), (2, 4), (5, 7), (2, 5)] The modified list : [(5, 6, 7, 2, 4, 6), (2, 4, 7, 2, 4, 6), (5, 7, 7, 2, 4, 6), (2, 5, 7, 2, 4, 6)]
Method #2 : Using list comprehension + "*" operator
The combination of above functions can be used to solve this problem. In this, we perform the task of adding list to a tuple using pack-unpack operator “*”. This is more efficient method than above method.
# Python3 code to demonstrate working of # Add list elements to tuples list# Using list comprehension + "*" operator # initializing listtest_list = [(5, 6), (2, 4), (5, 7), (2, 5)] # printing original listprint("The original list is : " + str(test_list)) # initializing list sub_list = [7, 2, 4, 6] # Add list elements to tuples list# Using list comprehension + "*" operatorres = [(*sub, *sub_list) for sub in test_list] # printing result print("The modified list : " + str(res)) |
The original list is : [(5, 6), (2, 4), (5, 7), (2, 5)] The modified list : [(5, 6, 7, 2, 4, 6), (2, 4, 7, 2, 4, 6), (5, 7, 7, 2, 4, 6), (2, 5, 7, 2, 4, 6)]
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.
