我怎样才能创建主内部课程？ [英] How can I create main inside class?

问题描述

我正在尝试学习使用类中的main函数，但因为我不知道如何使用它所以我的代码没有给出任何输出。据我所知，我需要在__init__方法下定义def main来写name == main，但问题是我不知道如何在主函数内部编写def getRoom和其他函数。我可以得到一些建议如何编写正确的程序？



我的代码如下：

I am trying to learn using main function inside a class but as I am not sure how to use it so my code is not giving any output. As far as i learned I need to define def main under the __init__ method to write name == main, but the problem is I do not know how to write the "def getRoom" and other function inside that main function. Can i get some suggestion how can I write the correct program?

My code is given below:

class Hotel:
    def __init__(self,room,catagory):
        
        if type(catagory) != str:
            raise TypeError()
        if room<0 or room >5:
            raise ValueError()
        self.room = room
        self.catagory = catagory
        self.catagories = {"A":"Elite","B":"Economy","C":"Regular"}
        self.rooms = ["0","1","2","3","4","5"]
        

    def getRoom(self):
        return self.room

    def getCatagory(self):
        
        return self.catagories.get(self.catagory)
    def __str__(self):
        return "%s and %s"%(self.rooms[self.room],self.catagories.get(self.catagory))
if (__name__== "__ main__"):
    r = Hotel ()
    print (r)
    try:
        room1 = Hotel(2,1)
        print (room1)
    except TypeError: 
        print("Error")
    try:
        room2= Hotel(1,"A")
        print (room2)
    except ValueError:
        print ("mistake")

我尝试过：



我试图创建def main（）但这对我的def getRoom不起作用和

def getCatagory

What I have tried:

I have tried to create " def main()" but that did not work with my "def getRoom" and
"def getCatagory"

推荐答案

你应该（自己）问'如何'，但'为什么'。 Python不是Java [ ^ ]。

You should ask (yourself) not 'how' but 'why'. Python is not Java[^].

你应该去 Python教程 - Python 3.7.2文档 [ ^ ]并通过它解决所有问题。

You should go to The Python Tutorial — Python 3.7.2 documentation[^] and work through it, where all your issues will be explained.

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