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Python | Summation of tuples in list
• Last Updated : 11 Nov, 2019

Sometimes, while working with records, we can have a problem in which we need to find the cummulative sum of all the values that are present in tuples. This can have application in cases in which we deal with a lot of records data. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using `sum() + map()`
Combination of above functions can be used to solve this particular problem. In this the task of summation is performed by `sum()`, and applying the summation functionality to each element in tuple list is performed by `map()`.

 `# Python3 code to demonstrate working of``# Summation of tuples in list``# using sum() + map()`` ` `# initialize list of tuple``test_list ``=` `[(``1``, ``3``), (``5``, ``6``, ``7``), (``2``, ``6``)]`` ` `# printing original tuples list``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Summation of tuples in list``# using sum() + map()``res ``=` `sum``(``map``(``sum``, test_list))`` ` `# printing result``print``(``"The summation of all tuple elements are : "` `+` `str``(res))`
Output :
```The original list : [(1, 3), (5, 6, 7), (2, 6)]
The summation of all tuple elements are : 30
```

Method #2 : Using` sum() + izip()`
The combination of above functions can be used to perform this particular task. In this, we perform the task of `map()` using `izip()`. It helps to club all the elements for summation by `sum()`. Works only for single element tuple and only with Python2.

 `# Python3 code to demonstrate working of``# Summation of tuples in list``# using sum() + izip()``from` `itertools ``import` `izip`` ` `# initialize list of tuple``test_list ``=` `[(``1``, ), (``5``, ), (``2``, )]`` ` `# printing original tuples list``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Summation of tuples in list``# using sum() + map()``res ``=` `sum``(``*``izip(``*``test_list))`` ` `# printing result``print``(``"The summation of all tuple elements are : "` `+` `str``(res))`
Output :
```The original list : [(1, ), (5, ), (2, )]
The summation of all tuple elements are : 8
```

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