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Custom sorting in list of tuples in Python
When it is required to sort the list of tuples in a customized manner, the 'sort' method can be used.
The 'sort' method sorts the elements of the iterable in a specific order, i.e ascending or descending. It sorts the iterable in-place.
A list can be used to store heterogeneous values (i.e data of any data type like integer, floating point, strings, and so on).
A list of tuple basically contains tuples enclosed in a list.
Below is a demonstration of the same −
Example
def tuple_sort(my_tup):
my_tup.sort(key = lambda x: x[1])
return my_tup
my_tuple = [('Will', 100), ('John', 67), ('Harold', 86), ('Jane', 35)]
print("The tuple is ")
print(my_tuple)
print("The sorted list of tuple is :")
print(tuple_sort(my_tuple))Output
The tuple is
[('Will', 100), ('John', 67), ('Harold', 86), ('Jane', 35)]
The sorted list of tuple is :
[('Jane', 35), ('John', 67), ('Harold', 86), ('Will', 100)]Explanation
- A function named 'tuple_sort' is defined, that takes a list of tuple as argument.
- This method uses the 'sort' method to sort the elements of the tuple using the lambda function.
- Lambda function takes a single expression, but can take any number of arguments.
- It uses the expression and returns the result of it.
- A list of tuple is defined, and is displayed on the console.
- The method is called by passing this list of tuple.
- This is assigned to a value.
- It is displayed on the console.
Updated on: 12-Mar-2021
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