Convert a List of Tuples into List in Python

October 7, 2023

 Convert a List of Tuples into List in Python :

For Converting a list of tuples into list, in Python firstly given a list of tuples, write a Python program to convert it into a list. we can perform this operation using various Methods. 

Example : 

  • a=[ ( 1, 2) , ( 3 ,4) ]
    • a = [1,2,3,4 ]
list in python

Convert a List of Tuples into List

In Python, Tuples are similar to lists, but with one crucial difference: they are immutable. This means that once you’ve defined a tuple, its contents cannot be changed. But Converting a list of tuples into a list in Python is a straightforward process. Whether you choose list comprehension or the itertools module, the result will be the same

Below are methods to convert list of tuples into a list in Python . 

Code 1 :

Run 
#Python Program 
# Python code to convert list of tuples into list 
# List of tuple initialization 

lt = [('A', 2), ('B', 4), ('C', '6')]

# using list comprehension 
liout = [item for t in lt for item in t]

# printing output 
print('The List is : ' , liout)

Output : 

The List is : ['A', 2, 'B', 4, 'C', '6']

Code 2:

Run 
#Python Program 
# Python code to convert list of tuples into list 

import itertools 

# List of tuple  
tup = [('A', 2), ('B', 4), (5, 6)] 

# Using itertools 
liout = list(itertools.chain(*tup)) 

# printing output 
print("The list is :" ,liout)

Output : 

The list is : ['A', 2, 'B', 4, 5, 6]

Code 3 :

Run 
#Python Program 
# Python code to convert list of tuples into list 
# List of tuple  

tup = [('A', 2), ('B', 4), (5, 6)] 

# Using itertools 
liout = []
for i in tup:
    for j in i: 
        liout.append(j)

# printing output 
print("The list is :" ,liout)

Output : 

The list is : ['A', 2, 'B', 4, 5, 6]

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Code 4 :

Run 
#Python Program 
# Python code to convert list of tuples into list 
# List of tuple  

tup = [('A', 2), ('B', 4), (5, 6)] 

# Using map for 0 index 
b = map(lambda x: x[0], tup) 

# Using map for 1 index 
c = map(lambda x: x[1], tup) 

# converting to list 
b = list(b) 
c = list(c) 

# Combining output 
liout = b + c 
print("The list is :" ,liout)

Output : 

The list is : ['A', 'B', 5, 2, 4, 6]

Code 5 :

Run 
#Python Program 
# Python code to convert list of tuples into list 
# List of tuple  

tup = [('A', 2), ('B', 4), (5, 6)] 

# using sum function() 
liout = list(sum(tup, ())) 
print("The list is :" ,liout)

Output :

The list is : ['A', 2, 'B', 4, 5, 6]

Code 6 :

Run 
#Python Program 
# Python code to convert list of tuples into list 

import operator 
from functools import reduce 

# List of tuple  
tup = [('A', 2), ('B', 4), (5, 6)] 
print("The list is :" ,(list(reduce(operator.concat, tup))))

Output :  

The list is : ['A', 2, 'B', 4, 5, 6]

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