Sorting a list using Python's sorted() function

Use Python's sorted() function to sort a list

Python is a powerful programming language that provides many built-in functions and methods to aid development People handle different tasks. One of the very useful functions is the sorted() function, which can be used to sort a list.

The sorted() function accepts an iterable object (such as a list or tuple) as a parameter and returns a new sorted list. You can sort elements based on size, alphabetical order, or custom rules.

Here are some sample codes that use the sorted() function to sort a list:

Example 1: Sort a list of numbers in ascending order

numbers = [5, 2 , 9, 1, 3]
sorted_numbers = sorted(numbers)
print(sorted_numbers)

Output result: [1, 2, 3, 5, 9]

Example 2: Sort a string list alphabetically

fruits = ["apple", "banana", "cherry", "date"]
sorted_fruits = sorted(fruits)
print( sorted_fruits)

Output result: ['apple', 'banana', 'cherry', 'date']

Example 3: Sort a string list according to string length

fruits = ["apple", "banana", "cherry", "date"]
sorted_fruits_by_length = sorted(fruits, key=len)
print(sorted_fruits_by_length)

Output Result: ['date', 'apple', 'banana', 'cherry']

Example 4: Sort a dictionary list according to the specified key

students = [{"name" : "Alice", "age": 18}, {"name": "Bob", "age": 20}, {"name": "Charlie", "age": 15}]
sorted_students_by_age = sorted (students, key=lambda x: x["age"])
print(sorted_students_by_age)

Output result: [{"name": "Charlie", "age": 15}, {" name": "Alice", "age": 18}, {"name": "Bob", "age": 20}]

Example 5: Sorting a complex list of objects

class Person:

def __init__(self, name, age):
    self.name = name
    self.age = age

def __repr__(self):
    return f"Person(name={self.name}, age={self.age})"

persons = [Person("Alice", 18), Person("Bob", 20), Person("Charlie", 15)]
sorted_persons_by_age = sorted( persons, key=lambda x: x.age)
print(sorted_persons_by_age)

Output result: [Person(name=Charlie, age=15), Person(name=Alice, age=18), Person(name=Bob, age=20)]

As can be seen from the above example, the sorted() function provides a very flexible sorting method. By appropriately using key parameters and lambda functions, we can achieve various sorting requirements for lists.

It should be noted that the sorted() function does not modify the original list, but returns a new sorted list. If you want to sort on the original list, you can use the sort() method of the list.

To summarize, sorting a list is very simple using Python’s sorted() function. You only need to pass in the list to be sorted as a parameter, and optionally specify the sorting method. I hope this article will help you understand the use of the sorted() function.

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