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Python list sort()
• Difficulty Level : Easy
• Last Updated : 06 Apr, 2020

The sort function can be used to sort a list in ascending, descending or user defined order.
To sort the list in ascending order.

List_name.sort()
This will sort the given list in ascending order.

This function can be used to sort list of integers, floating point number, string and others.

 numbers = [1, 3, 4, 2]  # Sorting list of Integers in ascendingnumbers.sort()  print(numbers)
Output:
[1, 2, 3, 4]
 strs = ["geeks", "code", "ide", "practice"]  # Sorting list of Integers in ascendingstrs.sort()  print(strs)
Output:

['code', 'geeks', 'ide', 'practice']

To sort the list in descending order.

list_name.sort(reverse=True)
This will sort the given list in descending order.

 numbers = [1, 3, 4, 2]  # Sorting list of Integers in descendingnumbers.sort(reverse = True)  print(numbers)
Output:
[4, 3, 2, 1]

Sorting user using user defined order.

list_name.sort(key=…, reverse=…) – it sorts according to user’s choice

 # Python program to demonstrate sorting by user's# choice  # function to return the second element of the# two elements passed as the parameterdef sortSecond(val):    return val[1]   # list1 to demonstrate the use of sorting # using using second key list1 = [(1, 2), (3, 3), (1, 1)]  # sorts the array in ascending according to # second elementlist1.sort(key = sortSecond) print(list1)  # sorts the array in descending according to# second elementlist1.sort(key = sortSecond, reverse = True)print(list1)
Output:
[(1, 1), (1, 2), (3, 3)]
[(3, 3), (1, 2), (1, 1)]

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