Python – Flatten tuple of List to tuple

Sometimes, while working with Python Tuples, we can have a problem in which we need to perform the flattening of tuples, which have lists as its constituent elements. This kind of problem is common in data domains such as Machine Learning. Let’s discuss certain ways in which this task can be performed.

Input : test_tuple = ([5], [6], [3], [8])
Output : (5, 6, 3, 8)

 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

Input : test_tuple = ([5, 7, 8])
Output : (5, 7, 8)

Method #1 : Using sum() + tuple()
The combination of above functions can be used to solve this problem. In this, we perform the task of flattening using sum(), passing empty list as its argument.

The original tuple : ([5, 6], [6, 7, 8, 9], [3])
The flattened tuple : (5, 6, 6, 7, 8, 9, 3)

Method #2 : Using tuple() + chain.from_iterable()
The combination of above functions can be used to solve this problem. In this, we perform task of flattening using from_iterable() and conversion to tuple using tuple().

The original tuple : ([5, 6], [6, 7, 8, 9], [3])
The flattened tuple : (5, 6, 6, 7, 8, 9, 3)