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Python – Find minimum k records from tuple list
• Last Updated : 17 Dec, 2019

Sometimes, while working with data, we can have a problem in which we have records and we require to find the lowest K scores from it. This kind of application is popular in web development domain. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using` sorted()` + lambda
The combination of above functionality can be used to perform this particular task. In this, we just employ sorted function, and print the lowest K elements using list slicing.

 `# Python3 code to demonstrate working of``# Minimum K records``# Using sorted() + lambda`` ` `# Initializing list ``test_list ``=` `[(``'Manjeet'``, ``10``), (``'Akshat'``, ``4``), (``'Akash'``, ``2``), (``'Nikhil'``, ``8``)]`` ` `# Initializing K``K ``=` `2`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# Minimum K records``# Using sorted() + lambda``res ``=` `sorted``(test_list, key ``=` `lambda` `x: x[``1``])[:K]`` ` `# printing result``print``(``"The lowest K records are : "` `+` `str``(res))`
Output :
```The original list is : [('Manjeet', 10), ('Akshat', 4), ('Akash', 2), ('Nikhil', 8)]
The lowest K records are : [('Akash', 2), ('Akshat', 4)]
```

Method #2 : Using `sorted() + itemgetter()`
The combination of above functions can also be used to perform this particular task. In this, the task performed by lambda function is performed by itemgetter() is used to get the index in tuple which has to be included in calculations.

 `# Python3 code to demonstrate working of``# Minimum K records``# Using sorted() + itemgetter()``from` `operator ``import` `itemgetter`` ` `# Initializing list ``test_list ``=` `[(``'Manjeet'``, ``10``), (``'Akshat'``, ``4``), (``'Akash'``, ``2``), (``'Nikhil'``, ``8``)]`` ` `# Initializing K``K ``=` `2`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# Minimum K records``# Using sorted() + itemgetter()``res ``=` `sorted``(test_list, key ``=` `itemgetter(``1``))[:K]`` ` `# printing result``print``(``"The lowest K records are : "` `+` `str``(res))`
Output :
```The original list is : [('Manjeet', 10), ('Akshat', 4), ('Akash', 2), ('Nikhil', 8)]
The lowest K records are : [('Akash', 2), ('Akshat', 4)]
```

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