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Python – Count elements in tuple list
• Last Updated : 27 Dec, 2019

Sometimes, while working with data in form of records, we can have a problem in which we need to find the count of all the records received. This is a very common application that can occur in Data Science domain. Letâ€™s discuss certain ways in which this task can be performed.

Method #1 : Using `len()` + generator expression
This is the most basic method to achieve solution to this task. In this, we iterate over whole nested lists using generator expression and get the count using len().

 `# Python3 code to demonstrate working of``# Tuple list elements count``# using len() + generator expression`` ` `# initialize list ``test_list ``=` `[(``2``, ``4``), (``6``, ``7``), (``5``, ``1``), (``6``, ``10``), (``8``, ``7``)]`` ` `# printing original list ``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Tuple list elements count``# using len() + generator expression``temp ``=` `list``((``int``(j) ``for` `i ``in` `test_list ``for` `j ``in` `i))``res ``=` `len``(temp)`` ` `# printing result``print``(``"The tuple list elements count : "` `+` `str``(res))`
Output :
```The original list : [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)]
The tuple list elements count : 10
```

Method #2 : Using `len() + map() + chain.from_iterable()`
The combination of above methods can also be used to perform this task. In this, the extension of finding count is done by combination of map() and from_iterable().

 `# Python3 code to demonstrate working of``# Tuple list elements count``# using len() + map() + chain.from_iterable()``from` `itertools ``import` `chain`` ` `# initialize list ``test_list ``=` `[(``2``, ``4``), (``6``, ``7``), (``5``, ``1``), (``6``, ``10``), (``8``, ``7``)]`` ` `# printing original list ``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Tuple list elements count``# using len() + map() + chain.from_iterable()``res ``=` `len``(``list``(``map``(``int``, chain.from_iterable(test_list))))`` ` `# printing result``print``(``"The tuple list elements count : "` `+` `str``(res))`
Output :
```The original list : [(2, 4), (6, 7), (5, 1), (6, 10), (8, 7)]
The tuple list elements count : 10
```

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