Write a python program to sort a list of objects based on a specific property.

Question

Aryan Kumar · Answer

class Person:
  def __init__(self, name, age):
    self.name = name
    self.age = age
  def __lt__(self, other):
    return self.age andlt; other.age
def sort_by_age(people):
  """
  Sorts a list of people by age.
  Args:
    people: The list of people to sort.
  Returns:
    A sorted list of people.
  """
  sorted_people = sorted(people, key=lambda person: person.age)
  return sorted_people
if __name__ == "__main__":
  people = [
      Person("John Doe", 30),
      Person("Jane Doe", 25),
      Person("Peter Smith", 40),
      Person("Mary Smith", 35),
  ]
  sorted_people = sort_by_age(people)
  for person in sorted_people:
    print(person.name, person.age)
This program works by first defining a class called Person. This class represents a person with a name and an age. The class defines a
__lt__() method that compares two people by their age. The method returns True if the first person is less than the second person, and False otherwise.
The sort_by_age() function takes a list of people as input and returns a sorted list of people. The function works by first using the
sorted() function to sort the list of people. The sorted() function takes a key parameter that specifies a function to use for sorting the list. In this case, the key parameter is a lambda function that gets the age of a person. The
sorted() function then returns a sorted list of people.
The main function of the program simply gets the list of people from the user and then calls the
sort_by_age() function to sort the list of people. The main function then prints the sorted list of people to the console.
To run the program, you can save it as a Python file and then run it from the command line. For example, if you save the program as
sort_by_age.py, you can run it by typing the following command into the command line:
Code snippet
python sort_by_age.py
This will print the sorted list of people to the console.
Here is an example of the output of the program:
Code snippet
$ python sort_by_age.py
Jane Doe 25
John Doe 30
Mary Smith 35
Peter Smith 40
As you can see, the output of the program is a sorted list of people, with the people sorted by their age.

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Write a python program to sort a list of objects based on a specific property.

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