实施Card类 [英] Implementing a `Card` class

问题描述

该程序是关于定义类Card的，该类在每次调用时都会生成卡(仅排名，不适用).我用的方法与说明不同，所以现在我对程序的工作原理感到非常困惑.

This program is about defining a class Card that generates a card whenever it is called (rank only, no suit). I did it a different way than the instructions so now I'm extremely confused on how this program is suppose to work.

import random
class Card:
    def __init__(self):
        self.__value = 0

    def deal(self):
        self.__value(random.randint(1,13))      

    def set_value(self, value):
        self.value = set_face_value

    def get_value():



    def set_face_value(self):
         faces = {1: "Ace", 2: "two", 3: "Three",  4: "Four", 5: "Five", 6: "Six", 7: "Seven", 8: "Eight", 9: "Nine", 10: "Ten", 11: "Jack", 12: "Queen", 13: "King"}
         self.face_value = faces[self.value]

    def __str__(self):
        return self.face_value

我不得不删除它，因为我仍在努力弄清楚自己做错了什么.这是她对我的计划的答复:

I had to erase so of it because I'm still trying to figure what I did wrong. This is her response for my program:

import random
class Card:
    def __init__(self):
        self.value = 0       # THIS SHOULD BE PRIVATE - PUT __ AS THE FIRST
                             # TWO CHARACTERS IN THE NAME
        self.face_value = '' # YOU DO NOT SAVE THIS
                             # YOU SHOULD HAVE ONLY ONE DATA ATTRIBUTE


    def deal(self):
        self.set_value(random.randint(1,13))
        # THIS METHOD DOES NOT NEED TO CALL "set_value
        # IT SHOULD JUST SET THE self.__value ATTRIBUTE



    def set_value(self, value):
        self.value = value
        self.set_face_value()  # READ THE ASSIGNMENT - YOU DO NOT HAVE A
                               # SET FOR THE FACE VALUE

    # YOU SHOULD NOT HAVE ANY SUCH METHOD IN YOUR CLASS
    def set_face_value(self):
         faces = {1: "Ace", 2: "two", 3: "Three",  4: "Four", 5: "Five", 6: "Six", 7: "Seven", 8: "Eight", 9: "Nine", 10: "Ten", 11: "Jack", 12: "Queen", 13: "King"}
         self.face_value = faces[self.value]

    # YOU SHOULD HAVE A "find_face_value" METHOD THAT RETURNS THE FACE VALUE BASED ON THE VALUE OF THE
    # PRIVATE DATA ATTRIBUTE "__value"

    # THIS IS NOT CORRECT    
    def __str__(self):
        return self.face_value

这些是她的批评:

• 您将在您的卡片类中定义一个deal方法:该方法将处理一张卡片(使用随机数生成器).
• 您将定义一个find_face_value方法，该方法将返回卡片对象的面值.您将从程序中删除display_face_value函数.
• 您的deal_hand函数会将对象列表传递给display_hand函数和hand stats函数，(从卡类中向该函数发送5张卡片)

• You will define a deal method in your class Card: this method will deal one card (using the random number generator).
• You will define a find_face_value method that will return the face value for the card object. You will remove the display_face_value function from your program.
• Your deal_hand function will pass the list of objects to the display_hand function and the hand stats function, (send 5 cards from the class Card to the function)

所以，我的主要问题是执行deal_hand并显示5手，它将显示如下:

So, my main problems is executing deal_hand and showing a hand of 5 and it will show like this:

    The 5-card hand is: 
         Jack
         Three
         Queen
         Two
         Seven
    The average value of your hand is:
         7.0
    #Also it should display like this
    print("Your card is", card)

英语不是我的母语，所以我很难理解它的真正含义.
这是他们要求的数据属性:

English is not my first language so is hard for me to understand what it really wants.
This is the Data attributes they are asking:

Class name:              Card
 Data attributes:        __value
 Methods:                __init__()
                         deal()
                         set_value()
                         get_value()
                         find_face_value()
                         __str__()

推荐答案

似乎要求您以非常特定的方式执行此操作. 我也不认为这是个好方法. 看起来您像老师在开始的private字段中调用了__的字段，就好像它是java的private字段一样，请注意并非如此.在python中，如果要使用Java样式的getter和setters，则应使用@property注释器. 还有许多其他可以改进的地方，由于要求我还没有做，希望对您有所帮助.

It looks like you are being asked to do this in a very specific way. I don't believe it is a good way of doing it either. It looks like you teacher calls fields with __ at the start private, as if it was a java private field, be aware this is not the case. In python, if you want to use java style getters and setters you should use the @property annotator. There are many other improvements that could be made, I have not done this due to the requirements, I hope this helps.

import random


class Card:
    def __init__(self):
        self.__value = 0

    def deal(self):
        self.__value = random.randint(1, 13)

    def set_value(self, value):
        self.__value = value

    def get_value(self):
        return self.__value

    def find_face_value(self):
        faces = {1: "Ace", 2: "two", 3: "Three", 4: "Four",
                 5: "Five", 6: "Six", 7: "Seven", 8: "Eight",
                 9: "Nine", 10: "Ten", 11: "Jack", 12: "Queen",
                 13: "King"}
        return faces[self.__value]

    def __str__(self):
        return self.find_face_value()


def main():
    card = Card()
    total = 0
    print("Your 5 hand card is:")
    for i in range(5):
        card.deal()
        print("Your card is", card)
        total += card.get_value()
    print("The average value of your hand is:")
    print(total/5)


main()

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