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

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

Examples:

```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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