Example 1: python sort dictionary by value descending
Python Code:
import operator
d = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
print('Original dictionary : ',d)
sorted_d = dict(sorted(d.items(), key=operator.itemgetter(1)))
print('Dictionary in ascending order by value : ',sorted_d)
sorted_d = dict(sorted(d.items(), key=operator.itemgetter(1),reverse=True))
print('Dictionary in descending order by value : ',sorted_d)
Sample Output:
Original dictionary : {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
Dictionary in ascending order by value : {0: 0, 2: 1, 1: 2, 4: 3, 3: 4}
Dictionary in descending order by value : {3: 4, 4: 3, 1: 2, 2: 1, 0: 0}
Example 2: python sort list in reverse order
# there are two types of lists
# returns new list
sorted(list_name, reverse=True)
# changes list in place
list_name.sort(reverse=True)
Example 3: python sort list in reverse
#1 Changes list
list.sort(reverse=True)
#2 Returns sorted list
sorted(list, reverse=True)
Example 4: python sort list
# sort() will change the original list into a sorted list
vowels = ['e', 'a', 'u', 'o', 'i']
vowels.sort()
# Output:
# ['a', 'e', 'i', 'o', 'u']
# sorted() will sort the list and return it while keeping the original
sortedVowels = sorted(vowels)
# Output:
# ['a', 'e', 'i', 'o', 'u']
Example 5: how to sort a list descending python
# defning A as a list
A.sort(reverse = True)
Example 6: pyhton built in sort
arr = [ 1, 3, 2]
arr.sort()