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Python | Convert list of tuples into list
• Difficulty Level : Easy
• Last Updated : 18 Feb, 2019

Given a list of tuples, write a Python program to convert it into list.

Examples:

```Input: [(11, 20), (13, 40), (55, 16)]
Output:[11, 20, 13, 40, 55, 16]

Input: [('Geeks', 2), ('For', 4), ('geek', '6')]
Output: ['Geeks', 2, 'For', 4, 'geek', '6']
```

Below are methods to convert list of tuples into list.

Method #1 : Using list comprehension

 `# Python code to convert list of tuples into list`` ` `# List of tuple initialization``lt ``=` `[(``'Geeks'``, ``2``), (``'For'``, ``4``), (``'geek'``, ``'6'``)]`` ` `# using list comprehension``out ``=` `[item ``for` `t ``in` `lt ``for` `item ``in` `t]`` ` `# printing output``print``(out)`
Output:

```['Geeks', 2, 'For', 4, 'geek', '6']
```

Method #2 : Using itertools

 `# Python code to convert list of tuple into list`` ` `# Importing``import` `itertools`` ` `# List of tuple initialization``tuple` `=` `[(``1``, ``2``), (``3``, ``4``), (``5``, ``6``)]`` ` `# Using itertools``out ``=` `list``(itertools.chain(``*``tuple``))`` ` `# printing output``print``(out)`
Output:
```[1, 2, 3, 4, 5, 6]
```

Method #3 : Using iteration

 `# Python code to convert list of tuple into list`` ` `# List of tuple initialization``tup ``=` `[(``1``, ``2``), (``3``, ``4``), (``5``, ``6``)]`` ` `# result list initialization``result ``=` `[]`` ` `for` `t ``in` `tup:``    ``for` `x ``in` `t:``        ``result.append(x)`` ` `# printing output``print``(result)`
Output:
```[1, 2, 3, 4, 5, 6]
```

Method #4 : Using `sum`

 `# Python code to convert list of tuple into list`` ` `# List of tuple initialization``tup ``=` `[(``1``, ``2``), (``3``, ``4``), (``5``, ``6``)]`` ` `# using sum function()``out ``=` `list``(``sum``(tup, ()))`` ` `# printing output``print``(out)`
Output:
```[1, 2, 3, 4, 5, 6]
```

Method #5 : Using operator and reduce

 `# Python code to convert list of tuple into list`` ` `import` `operator``from` `functools ``import` `reduce`` ` `# List of tuple initialization``tup ``=` `[(``1``, ``2``), (``3``, ``4``), (``5``, ``6``)]`` ` `# printing output``print``(``list``(``reduce``(operator.concat, tup)))`
Output:
```[1, 2, 3, 4, 5, 6]
```

Method #6 : Using `lambda`

 `# Python code to convert list of tuple into list`` ` ` ` `# List of tuple initialization``tup ``=` `[(``1``, ``2``), (``3``, ``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``out ``=` `b ``+` `c`` ` `# printing output``print``(out)`
Output:
```[1, 3, 5, 2, 4, 6]
```

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