Python | Sort a List according to the Length of the Elements
In this program, we need to accept a list and sort it based on the length of the elements present within.
Examples:
Sort a list according to the Length of the Elements in Python program
PythonServer Side ProgrammingProgramming
We have a list of strings and our goal is to sort the list based on the length of strings in the list. We have to arrange the strings in ascending order according to their lengths. We can do this using our algorithms or Python built-in method sort() or function sorted() along with a key.
Let's take an example to see the output.
Input: strings = ["hafeez", "aslan", "honey", "appi"] Output: ["appi", "aslan", "honey", "hafeez"]Let's write our program using sort(key) and sorted(key). Follow the below steps to achieve the desired output using a sorted(key) function.
Python program to sort a List according to the Length of the Elements?
PythonProgrammingServer Side Programming
Here we use one user input array and we have to sorted the list according to the length of the elements. Here we use Python inbuilt function sorted().
Python List sort()
In this tutorial, we will learn about the Python sort() method with the help of examples.
The sort() method sorts the elements of a given list in a specific ascending or descending order.
Example
prime_numbers = [11, 3, 7, 5, 2]# sort the list
prime_numbers.sort()
print(prime_numbers)
# Output: [2, 3, 5, 7, 11]Python List sort() - Sorts Ascending or Descending List
The list.sort() method sorts the elements of a list in ascending or descending order using the default < comparisons operator between items.
Use the key parameter to pass the function name to be used for comparison instead of the default < operator. Set the reverse parameter to True, to get the list in descending order.
Syntax:
list.sort(key=None, reverse=False)Parameters:
- key: (Optional) A function that extracts a comparison key from each list element while sorting.
- reverse: (Optional) If true, the sorted list will be reversed. By default, it is False.
Return Value:
No return value. It sorts the list itself.
The following example demonstrates the sort() function on numeric lists.
Example: Sort Numeric List
Copynums = [1, 5, 3, 4, 2, 10, 6, 8, 7, 9]
nums.sort()
print('List in Ascending Order: ', nums)
nums.sort(reverse=True)
print('List in Descending Order: ', nums)
Output
List in Ascending Order: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
List in Descending Order: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
The sort() method can also be used on character lists.
Example: Sort Char List
Copyal = ['a','d','e','c','b']
al.sort(reverse=True)
print('List in Descending Order: ', al)
al.sort()
print('List in Ascending Order: ', al)
Output
List in Descending Order: ['e', 'd', 'c', 'b', 'a']
List in Ascending Order: ['a', 'b', 'c', 'd', 'e']
The following example sorts the string list in alphabetical order.
Example: Sort String List
Copycities = ['Mumbai', 'London', 'Paris', 'New York']
cities.sort()
print('List in Ascending Order: ', cities)
cities.sort(reverse=True)
print('List in Descending Order: ', cities)
Output
List in Ascending Order: ['London', 'Mumbai', 'New York', 'Paris']
List in Descending Order: ['Paris', 'New York', 'Mumbai', 'London']
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Introduction to the Python List sort() method
To sort a list, you use the sort() method:
list.sort()
Code language: Python (python)The sort() method sorts the original list in place. It means that the sort() method modifies the order of elements in the list.
By default, the sort() method sorts the elements of a list using the less-than operator (<). In other words, it places the lower elements before the higher ones.
To sort elements from higher to lower, you pass the reverse=True argument to the sort() method like this:
list.sort(reverse=True)
Code language: Python (python)