Python 故障循环和避免崩溃

我一直很难让这个程序循环。。。我想如果他们以错误的格式给出字符串或日期，我会要求输入…这是我的代码，我不知道为什么它不起作用。每次我运行它并输入字符串时，第一次它会说“哎呀！那不是一个有效的日期。请重试…”如果用户再次输入错误的输入，它将崩溃

---

这是我的密码

while 1 == 1:
    try:
        birthday = raw_input("Enter your Birth date in MM/DD/YYYY format: ")
        birth_date = datetime.strptime(birthday, '%m/%d/%Y')

     except ValueError:
        print "Oops!  That was not a valid date. Try again..."
        birthday = raw_input("Enter your Birth date in MM/DD/YYYY format: ")
        birth_date = datetime.strptime(birthday, '%m/%d/%Y')

     if (((datetime.today() - birth_date).days)/365.2425) > 110:        
        print "Sorry You are older than 110 year i cannot do that math."

     elif ((datetime.today() - birth_date).days) < 0:
        print "Sorry you entered a date in the furture."

     elif ((datetime.today() - birth_date).days) == 0:
        print "OMG You were just born, tomorrow you will be one day old."
        else:
        print "Age: %d days " % ((datetime.today() - birth_date).days)

---

发生此错误是因为原始输入“ASFA”中的输入数据与预期的日期时间格式“%m/%d/%Y”不匹配

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试着输入“01/20/1999”之类的内容。

好吧，除了块之外，你没有什么可以捕捉错误的。你可能想要：P

尝试：

---

您的代码格式错误：

while True:
    try:
        birthday = raw_input("Enter your Birth date in MM/DD/YYYY format: ")
        birth_date = datetime.strptime(birthday, '%m/%d/%Y')
        break
    except ValueError:
        print "Oops!  That was not a valid date. Try again..."

if (((datetime.today() - birth_date).days)/365.2425) > 110:        
    print "Sorry You are older than 110 year i cannot do that math."

elif ((datetime.today() - birth_date).days) < 0:
    print "Sorry you entered a date in the furture."

elif ((datetime.today() - birth_date).days) == 0:
    print "OMG You were just born, tomorrow you will be one day old."
else:
    print "Age: %d days " % ((datetime.today() - birth_date).days)

尽管更像这样的东西可能更可取：

def age_finder():
    while True:
        try:
            birthday = input("Enter your Birth date in MM/DD/YYYY format: ")
            birth_date = datetime.strptime(birthday, '%m/%d/%Y')
            break
        except ValueError:
            print("Oops!  That was not a valid date. Try again...") 

    if (((datetime.today() - birth_date).days)/365.2425) > 110:        
        print("Sorry You are older than 110 year i cannot do that math.") 

    elif ((datetime.today() - birth_date).days) < 0:
        print("Sorry you entered a date in the furture.") 

    elif ((datetime.today() - birth_date).days) == 0:
        print("OMG You were just born, tomorrow you will be one day old.") 
    else:
        print("Age: %d days " % ((datetime.today() - birth_date).days))

if __name__ == '__main__':
    try:
        while True:
            age_finder()
    except KeyBoardInterrupt:
        print()
        print('Thanks for using my app')
        exit()

def age_finder（）：
尽管如此：
尝试：
生日=输入（“以MM/DD/YYYY格式输入您的出生日期：”）
出生日期=datetime.strtime（生日，%m/%d/%Y'）
打破
除值错误外：
打印（“哦！那不是一个有效的日期。请重试…”）
如果（（（datetime.today（）-出生日期）.days）/365.2425）>110：
打印（“对不起，你已经超过110岁了，我无法计算。”）
elif（（datetime.today（）-出生日期）.days）<0:
打印（“很抱歉，您在以后输入了日期。”）
elif（（datetime.today（）-出生日期）.days）=0:
打印（“天哪，你刚出生，明天你就有一天大了。”）
其他：
打印（“年龄：%d天”（（datetime.today（）-出生日期）.days））
如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu'：
尝试：
尽管如此：
年龄查找器（）
除键盘中断外：
打印（）
打印（'感谢使用我的应用程序'）
退出（）

---

这可以防止用户窗体在按ctrl+c时显示看起来很糟糕的错误文本。

是什么输入导致了此错误消息？有关pythonThank的try/except/else/finally结构的更多详细信息，请参阅，这就解决了…但我还有一个问题，如果我想让它继续要求另一个日期，即使他们输入了一个有效的日期，我要求的好奇心，就像我需要有另一个循环

while True:
    try:
        birthday = raw_input("Enter your Birth date in MM/DD/YYYY format: ")
        birth_date = datetime.strptime(birthday, '%m/%d/%Y')
        break
    except ValueError:
        print "Oops!  That was not a valid date. Try again..."

if (((datetime.today() - birth_date).days)/365.2425) > 110:        
    print "Sorry You are older than 110 year i cannot do that math."

elif ((datetime.today() - birth_date).days) < 0:
    print "Sorry you entered a date in the furture."

elif ((datetime.today() - birth_date).days) == 0:
    print "OMG You were just born, tomorrow you will be one day old."
else:
    print "Age: %d days " % ((datetime.today() - birth_date).days)

while True:
    while True:
        try:
            birthday = input("Enter your Birth date in MM/DD/YYYY format: ")
            birth_date = datetime.strptime(birthday, '%m/%d/%Y')
            break
        except ValueError:
            print("Oops!  That was not a valid date. Try again...") 

    if (((datetime.today() - birth_date).days)/365.2425) > 110:        
        print("Sorry You are older than 110 year i cannot do that math.") 

    elif ((datetime.today() - birth_date).days) < 0:
        print("Sorry you entered a date in the furture.") 

    elif ((datetime.today() - birth_date).days) == 0:
        print("OMG You were just born, tomorrow you will be one day old.") 
    else:
        print("Age: %d days " % ((datetime.today() - birth_date).days))

def age_finder():
    while True:
        try:
            birthday = input("Enter your Birth date in MM/DD/YYYY format: ")
            birth_date = datetime.strptime(birthday, '%m/%d/%Y')
            break
        except ValueError:
            print("Oops!  That was not a valid date. Try again...") 

    if (((datetime.today() - birth_date).days)/365.2425) > 110:        
        print("Sorry You are older than 110 year i cannot do that math.") 

    elif ((datetime.today() - birth_date).days) < 0:
        print("Sorry you entered a date in the furture.") 

    elif ((datetime.today() - birth_date).days) == 0:
        print("OMG You were just born, tomorrow you will be one day old.") 
    else:
        print("Age: %d days " % ((datetime.today() - birth_date).days))

if __name__ == '__main__':
    try:
        while True:
            age_finder()
    except KeyBoardInterrupt:
        print()
        print('Thanks for using my app')
        exit()