Get first 3 largest elements of a list (without sorting the whole list)

find_first_3_elements.py

import random


def get_random_numbers(amount):
    random_numbers = random.sample(range(1, 1000), amount)
    print([x for x in reversed(sorted(random_numbers))])
    return random_numbers


numbers = get_random_numbers(100)

first_largest = 0
second_largest = 0
third_largest = 0

for number in numbers:
    if number > first_largest:
        third_largest = second_largest
        second_largest = first_largest
        first_largest = number
    elif number > second_largest:
        third_largest = second_largest
        second_largest = number
    elif number > third_largest:
        third_largest = number

print(first_largest, second_largest, third_largest)