# Convert list of tuples into list in Python

PythonServer Side ProgrammingProgramming

We may come across a lists whose elements are tuples. But for further data processing we may need to convert the tuples to the normal elements of a list. In this article we will see the approaches to achieve this.

## With list comprehension

In this approach we design nested for loops to iterate through each tuple and produce the final list of elements.

## Example

Live Demo

listA = [('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
# Given list
print("Given list : \n", listA)
res = [item for t in listA for item in t]
# Result
print("Final list: \n",res)

## Output

Running the above code gives us the following result −

Given list :
[('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
Final list:
['Mon', 3, 'Wed', 4, 'Fri', 7, 'pm']

## With itertools

We can also use the itertools.chain method along with * operator which will fetch each element in the list of tuples and then combine them as a series of elements for the list.

## Example

Live Demo

import itertools
listA = [('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
# Given list
print("Given list : \n", listA)
res = list(itertools.chain(*listA))
# Result
print("Final list: \n",res)

## Output

Running the above code gives us the following result −

Given list :
[('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
Final list:
['Mon', 3, 'Wed', 4, 'Fri', 7, 'pm']

## With reduce and concat

The reduce function in used to apply the concat function to each of the list elements which finally produces a list of all elements from the original list.

## Example

Live Demo

import operator
from functools import reduce
listA = [('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
# Given list
print("Given list : \n", listA)
res = (list(reduce(operator.concat, listA)))
# Result
print("Final list: \n",res)

## Output

Running the above code gives us the following result −

Given list :
[('Mon', 3), ('Wed', 4), ('Fri', 7, 'pm')]
Final list:
['Mon', 3, 'Wed', 4, 'Fri', 7, 'pm']
Published on 20-May-2020 14:32:48