# Python | Counting Nth tuple element

Sometimes, while working with Python, we can have a problem in which we need to count the occurrence of a particular’s elements. This kind of problem is quite common while working with records. Let’s discuss a way in which this task can be performed.

Method #1 : Using `Counter()` + generator expression
The combination of above functionalities can be used to achieve this particular task. In this, we iterate through a specific index using generator expression and compute the count using `Counter()`.

 `# Python3 code to demonstrate working of ` `# Counting Nth tuple element ` `# using Counter() + generator expression ` `from` `collections ``import` `Counter ` ` `  `# initialize list ` `test_list ``=` `[(``'gfg'``, ``0``), (``'is'``, ``1``), (``'best'``, ``2``), ` `             ``(``'gfg'``, ``2``), (``'is'``, ``0``), (``'for'``, ``1``), ` `             ``(``'geeks'``, ``2``)] ` ` `  `# printing original list ` `print``(``"The original list : "` `+` `str``(test_list)) ` ` `  `# initialize N ` `N ``=` `1` ` `  `# Counting Nth tuple element ` `# using Counter() + generator expression ` `res ``=` `dict``(Counter(sub[N] ``for` `sub ``in` `test_list)) ` ` `  `# printing result ` `print``(``"The grouped Nth element frequency is : "` `+` `str``(res)) `

Output :

The original list : [(‘gfg’, 0), (‘is’, 1), (‘best’, 2), (‘gfg’, 2), (‘is’, 0), (‘for’, 1), (‘geeks’, 2)]
The grouped Nth element frequency is : {0: 2, 1: 2, 2: 3}

Method #2 : Using `Counter() + map() + itemgetter()`
The combination of above functions can be used to achieve this task. In this, the task performed by generator expression is performed by `map() and itemgetter()` is used to get the index of the container element.

 `# Python3 code to demonstrate working of ` `# Counting Nth tuple element ` `# using Counter() + map() + itemgetter() ` `from` `collections ``import` `Counter ` `from` `operator ``import` `itemgetter ` ` `  `# initialize list ` `test_list ``=` `[(``'gfg'``, ``0``), (``'is'``, ``1``), (``'best'``, ``2``),  ` `             ``(``'gfg'``, ``2``), (``'is'``, ``0``), (``'for'``, ``1``), ` `             ``(``'geeks'``, ``2``)] ` ` `  `# printing original list ` `print``(``"The original list : "` `+` `str``(test_list)) ` ` `  `# initialize N ` `N ``=` `1` ` `  `# Counting Nth tuple element ` `# using Counter() + map() + itemgetter() ` `res ``=` `dict``(Counter(``map``(itemgetter(N), test_list))) ` ` `  `# printing result ` `print``(``"The grouped Nth element frequency is : "` `+` `str``(res)) `

Output :

The original list : [(‘gfg’, 0), (‘is’, 1), (‘best’, 2), (‘gfg’, 2), (‘is’, 0), (‘for’, 1), (‘geeks’, 2)]
The grouped Nth element frequency is : {0: 2, 1: 2, 2: 3}

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