Python 生日悖论

Question

我正试图让它正确地执行生日悖论，并已将其压缩以希望在固定状态下有意义。我相信我知道我的错误在哪里，但我不太确定我该如何解决它们。我删除了许多循环和打印语句，希望能理解我正在尝试做的事情。当我使用以下代码运行它时，它会执行一些操作，但我需要它通过用户输入以及特定输入的正确操作次数来执行它

# Birthday Paradox Program

import random
import datetime

matchedBirthdays = []
theBirthdays = []

# Generate birthdays
def generateBirthdays(numBirthdays):
    for i in range(numBirthdays):
        x = datetime.datetime.now()
        presentYear = x.year

        year = random.randint(1900, presentYear)
        month = random.randint(1, 12)

        if month == 2:
            day = random.randint(1, 28)
        elif month % 2 == 1 and month <= 7:
            day = random.randint(1, 31)
        else:
            day = random.randint(1, 30)

        x = datetime.datetime(year, month, day)
        birthday = x.strftime("%b") + " " + x.strftime("%d")
        theBirthdays.append(birthday)
        return theBirthdays


def matchBirthday(theBirthdays):
    global matchedBirthdays
    count = 0
    for i in range(len(theBirthdays)):
        if theBirthdays.count(theBirthdays[i]) > 1 and matchedBirthdays.__contains__(theBirthdays[i]) == False:
            matchedBirthdays.append(theBirthdays[i])
        else:
            continue
    count = len(matchedBirthdays)
    return count

numBirthdays = 8

theBirthdays = generateBirthdays(numBirthdays)

# numBirthdays = int(input("How many birthdays shall I generate? (Max 100)\n"))
# Check user input

# Generate birthdays

# Print out each birthday
print("Here are " + str(numBirthdays) + " birthdays:")

matchedBirthdays = []

print("Generating " + str(numBirthdays) + " random birthdays 100,000 times...")

sum = 0
for i in range(11):
    theBirthdays = generateBirthdays(numBirthdays)
    sum += matchBirthday(theBirthdays)

chance = round((sum / 100000) * 100, 2)

print("Out of 100,000 simulations of " + str(numBirthdays) + " people, there was a matching birthday in that group " + str(sum) + " times. This means that " + str(numBirthdays) + " people have a " + str(chance) + "% "
    "chance of having a matching\n birthday in their group.")