Python，分隔if语句

Question

我一直在做一些 python 编码，遇到了一个恼人的问题。我在一个相当大的脚本中有两个 if 语句:

    from datetime import datetime
answer_simpl = "worded_date"
if answer_simpl == "worded_date":
    now = datetime.now()
    day = now.day
    month = now.month
    year = now.year
if day == "1":
    num_th = "st"
elif day == "21":
    num_th = "st"
elif day == "31":
    num_th = "st"
elif day == "2":
    num_th = "nd"
elif day == "22":
    num_th = "nd"
elif day == "32":
    num_th = "nd"
elif day == "3":
    num_th = "rd"
elif day == "23":
    num_th = "rd"
else: num_th = "th"
if month == "1":
    month_word = "January"
elif month == "2":
    month_word = "Febuary"
elif month == "3":
    month_word = "March"
elif month == "4":
    month_word = "April"
elif month == "5":
    month_word = "May"
elif month == "6":
    month_word = "June"
elif month == "7":
    month_word = "July"
elif month == "8":
    month_word = "August"
elif month == "9":
    month_word = "September"
elif month == "10":
    month_word = "October"
elif month == "11":
    month_word = "November"
elif month == "12":
    month_word = "December"
print("The date is {}{} of".format(day,num_th),month_word,year)

当我运行它时，它会一直工作，直到它尝试打印“month_word”。它说它没有定义，但超过 24 行代码却说不对。我已经尝试了很多东西，但仍然找不到任何东西来修复它。我似乎找不到定义“month_word”的方法，因为它认为它是最后一个“else:”语句的一部分。是否有某种命令可以分隔语句？我说的是真的，它是最后一个“else:”的一部分。我真的需要一些帮助，关于这方面的任何信息都会非常有帮助!

Answer 1

您的问题是因为 day、month 和 year 是整数，并且您将它们与字符串值进行比较，所以基本上您的第二个 if 语句不会执行任何 month_word = ...，因此变量 month_word 不会被定义。

将您的条件更改为整数，例如elif month == 5:.

更新

也试着想一个比这更好的实现，比如:

import calendar
from datetime import datetime

now = datetime.now()
day = now.day
month = now.month
year = now.year

num_th = {1:  'st',
          21: 'st',
          31: 'st',
          2:  'nd',
          22: 'nd',
          3:  'rd'}.get(day, 'th')
month_word = calendar.month_name[month]

print("The date is {}{} of".format(day, num_th), month_word, year)