Some unique sorting functions in Python

Here are some unique ways to sort in python

Sort list in Descending order

# vowels list
vowels = ['e', 'a', 'u', 'o', 'i']

# sort the vowels
vowels.sort(reverse=True)

# print vowels
print('Sorted list (in Descending):', vowels)

Output

Sorted list (in Descending): ['u', 'o', 'i', 'e', 'a']

Sorting using custom key

# sorting using custom key
employees = [
    {'Name': 'Alan Turing', 'age': 25, 'salary': 10000},
    {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000},
    {'Name': 'John Hopkins', 'age': 18, 'salary': 1000},
    {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000},
]

# custom functions to get employee info
def get_name(employee):
    return employee.get('Name')


def get_age(employee):
    return employee.get('age')


def get_salary(employee):
    return employee.get('salary')


# sort by name (Ascending order)
employees.sort(key=get_name)
print(employees, end='\n\n')

# sort by Age (Ascending order)
employees.sort(key=get_age)
print(employees, end='\n\n')

# sort by salary (Descending order)
employees.sort(key=get_salary, reverse=True)
print(employees, end='\n\n')

Output

[{'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'John Hopkins', 'age': 18, 'salary': 1000}, {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}]

[{'Name': 'John Hopkins', 'age': 18, 'salary': 1000}, {'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}, {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}]

[{'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}, {'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}, {'Name': 'John Hopkins', 'age': 18, 'salary': 1000}]

Soft using custom key with lambda

# sorting using custom key
employees = [
    {'Name': 'Alan Turing', 'age': 25, 'salary': 10000},
    {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000},
    {'Name': 'John Hopkins', 'age': 18, 'salary': 1000},
    {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000},
]

# sort by name (Ascending order)
employees.sort(key=lambda x: x.get('Name'))
print(employees, end='\n\n')

# sort by Age (Ascending order)
employees.sort(key=lambda x: x.get('age'))
print(employees, end='\n\n')

# sort by salary (Descending order)
employees.sort(key=lambda x: x.get('salary'), reverse=True)
print(employees, end='\n\n')

Output

[{'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'John Hopkins', 'age': 18, 'salary': 1000}, {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}]

[{'Name': 'John Hopkins', 'age': 18, 'salary': 1000}, {'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}, {'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}]

[{'Name': 'Mikhail Tal', 'age': 40, 'salary': 15000}, {'Name': 'Alan Turing', 'age': 25, 'salary': 10000}, {'Name': 'Sharon Lin', 'age': 30, 'salary': 8000}, {'Name': 'John Hopkins', 'age': 18, 'salary': 1000}]

Reference: https://www.programiz.com/python-programming/methods/list/sort