有关字符串的python问题

Question

def shut_down(s):
    s = s.Lower()
    if s  == 'yes' :
        return "Shutting down..."
    elif s ==  'no':
        return "Shutdown aborted!"
    else :
        return "Sorry, I didn't understand you."

计算机告诉我你的shut_down函数引发了以下错误：'str'对象没有属性'Lower'

Answer 1

您的.Lower()在python中不可用，因为它使用区分大小写的语言.lower()

     def shut_down(s):
         s = s.lower()

         if s  == 'yes' :
              return "Shutting down..."
         elif s ==  'no':
              return "Shutdown aborted!"
         else :
             return "Sorry, I didn't understand you."