我在理解此代码时遇到问题

Question

# Split string method
names_string = input("Give me everybody's names, separated by a comma. ")
names = names_string.split(", ")
# ? Don't change the code above ?

#Write your code below this line ?
import random

num_items = len(names)
random_choice = random.randint(0, num_items - 1)
person_who_will_pay = names[random_choice]
print(person_who_will_pay + " Is going to pay the bill!")

我从 udemy 的 Angela Yu 那里花了 100 天的代码，我目前在随机模块 Day-4 中，但我不明白这段代码，谁能解释一下这段代码发生了什么。

Answer 1

names_string = input("Give me everybody's names, separated by a comma. ")
# Gets input from the user as a string type.

names = names_string.split(", ")
# Splits the input string into a list of names.
# If names_string = "John, Mark, Mary", names = ["John", "Mark", "Mary"]


import random

num_items = len(names)
# Gets number of names in the list

random_choice = random.randint(0, num_items - 1)
# Selects a random index in the array from 0 to (number of names - 1)

person_who_will_pay = names[random_choice]
# Gets name stored at the chosen index.

print(person_who_will_pay + " Is going to pay the bill!")
# Prints person's name