Syntax error Remove tuples having duplicate first value from given list of tuples in Python

Remove tuples having duplicate first value from given list of tuples in Python

When it is required to remove tuples that have a duplicate first value from a given set of list of tuples, a simple 'for' loop, and the 'add' and 'append' methods can be used.

Below is a demonstration for the same −

Example

Live Demo

my_input = [(45.324, 'Hi Jane, how are you'),(34252.85832, 'Hope you are good'),(45.324, 'You are the best.')]
visited_data = set()

my_output_list = []
for a, b in my_input:
   if not a in visited_data:
      visited_data.add(a)
      my_output_list.append((a, b))

print("The list of tuple is : ")
print(my_input)
print("The list of tuple after removing duplicates is :")
print(my_output_list)

Output

The list of tuple is :
[(45.324, 'Hi Jane, how are you'), (34252.85832, 'Hope you are good'), (45.324, 'You are the best.')]
The list of tuple after removing duplicates is :
[(45.324, 'Hi Jane, how are you'), (34252.85832, 'Hope you are good')]

Explanation

  • A list of tuple is defined, and is displayed on the console.
  • An empty set is created, as well as an empty list.
  • The list of tuple is iterated over, and if it is not present in the 'set', it is added to the set, as well as to the list.
  • This is the output that is displayed on the console.
Updated on: 2021-03-13T05:38:17+05:30

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