# Python program to convert tuple into list by adding the given string after every element

• Last Updated : 08 Jun, 2021

Given a Tuple. The task is to convert it to List by adding the given string after every element.

Examples:

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```Input : test_tup = (5, 6, 7), K = "Gfg"
Output : [5, 'Gfg', 6, 'Gfg', 7, 'Gfg']
Explanation : Added "Gfg" as succeeding element.

Input : test_tup = (5, 6), K = "Gfg"
Output : [5, 'Gfg', 6, 'Gfg']
Explanation : Added "Gfg" as succeeding element.```

Method #1: Using list comprehension

In this, we construct a tuple of each element of tuple with a succeeding element and then run a nested loop to flatten each constructed tuple using list comprehension.

## Python3

 `# Python3 code to demonstrate working of``# Convert tuple to List with succeeding element``# Using list comprehension` `# initializing tuple``test_tup ``=` `(``5``, ``6``, ``7``, ``4``, ``9``)` `# printing original tuple``print``(``"The original tuple is : "``, test_tup)` `# initializing K``K ``=` `"Gfg"` `# list comprehension for nested loop for flatten``res ``=` `[ele ``for` `sub ``in` `test_tup ``for` `ele ``in` `(sub, K)]` `# printing result``print``(``"Converted Tuple with K : "``, res)`

Output:

The original tuple is :  (5, 6, 7, 4, 9)
Converted Tuple with K :  [5, ‘Gfg’, 6, ‘Gfg’, 7, ‘Gfg’, 4, ‘Gfg’, 9, ‘Gfg’]

Method #2 : Using chain.from_iterable() + list() + generator expression

This is similar to above method, difference is that nested loop is avoided by flattenning using chain.from_iterable().

## Python3

 `# Python3 code to demonstrate working of``# Convert tuple to List with succeeding element``# Using chain.from_iterable() + list() + generator expression``from` `itertools ``import` `chain` `# initializing tuple``test_tup ``=` `(``5``, ``6``, ``7``, ``4``, ``9``)` `# printing original tuple``print``(``"The original tuple is : "``, test_tup)` `# initializing K``K ``=` `"Gfg"` `# list comprehension for nested loop for flatten``res ``=` `list``(chain.from_iterable((ele, K) ``for` `ele ``in` `test_tup))` `# printing result``print``(``"Converted Tuple with K : "``, res)`

Output:

The original tuple is :  (5, 6, 7, 4, 9)
Converted Tuple with K :  [5, ‘Gfg’, 6, ‘Gfg’, 7, ‘Gfg’, 4, ‘Gfg’, 9, ‘Gfg’]

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