Join Tuples if similar initial element in Python

When it is required to join tuples if they contain a similar initial element, a simple ‘for’ loop and an ‘of’ condition can be used. To store elements to one list, the ‘extend’ method can be used.

Below is the demonstration of the same −

Example

 Live Demo

my_list = [(43, 15), (66, 98), (64, 80), (14, 9), (47, 17)]

print("The list is : ")
print(my_list)

my_result = []
for sub in my_list:
   if my_result and my_result[-1][0] == sub[0]:
      my_result[-1].extend(sub[1:])
   else:
      my_result.append([ele for ele in sub])
my_result = list(map(tuple, my_result))

print("The extracted elements are : " )
print(my_result)

Output

The list is :
[(43, 15), (66, 98), (64, 80), (14, 9), (47, 17)]
The extracted elements are :
[(43, 15), (66, 98), (64, 80), (14, 9), (47, 17)]

Explanation

• A list of tuple is defined, and is displayed on the console.

• An empty list is defined.

• The list of tuple is iterated over, and is checked to see if the initial elements match.

• If they match, the element is stored in the empty list.

• Otherwise, it is first converted into tuple, and then to a list, and then stored in the empty lit.

• This is the output that is displayed on the console.

AmitDiwan

Published on 17-Apr-2021 13:03:12

• Related Questions & Answers
• Check if element is present in tuple of tuples in Python
• N element incremental tuples in Python
• Remove similar element rows in tuple Matrix in Python
• Find the Maximum of Similar Indices in two list of Tuples in Python
• Accessing nth element from Python tuples in list
• Remove tuples from list of tuples if greater than n in Python
• Python – Test if Rows have Similar frequency
• Filter Tuples by Kth element from List in Python
• Filter tuples according to list element presence in Python
• Python – Remove Rows for similar Kth column element
• Find the tuples containing the given element from a list of tuples in Python
• Checking if starting digits are similar in list in Python
• Python program to Sort Tuples by their Maximum element
• Rear element extraction from list of tuples records in Python
• Check if two list of tuples are identical in Python