Python | Count tuples occurrence in list of tuples

Many a time while developing web and desktop product in Python, we use nested lists and have several queries about how to find count of unique tuples. Let’s see how to get count of unique tuples in given list of tuples.

Below are some ways to achieve the above task.

Method #1: Using Iteration

# Python code to count unique  
# tuples in list of list 
  
import collections  
Output = collections.defaultdict(int) 
  
# List initialization 
Input = [[('hi', 'bye')], [('Geeks', 'forGeeks')], 
         [('a', 'b')], [('hi', 'bye')], [('a', 'b')]] 
  
# Using iteration 
for elem in Input: 
      Output[elem[0]] += 1
      
# Printing output 
print(Output) 

Output:

defaultdict(<class 'int'>, {('Geeks', 'forGeeks'): 1, ('hi', 'bye'): 2, ('a', 'b'): 2})

Method #2: Using chain and Counter

# Python code to count unique  
# tuples in list of list 
  
# Importing 
from collections import Counter 
from itertools import chain 
  
# List initialization 
Input = [[('hi', 'bye')], [('Geeks', 'forGeeks')], 
         [('a', 'b')], [('hi', 'bye')], [('a', 'b')]] 
  
# Using counter and chain 
Output = Counter(chain(*Input)) 
  
# Printing output 
print(Output) 

Output:

Counter({('hi', 'bye'): 2, ('a', 'b'): 2, ('Geeks', 'forGeeks'): 1})

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