使用用户输入来订购商品的决策树 [英] Building a decision tree using user inputs for ordering goods

问题描述

我正在尝试对决策树进行编程，以允许客户根据他们的输入来订购商品。到目前为止，我已经设计了一个嵌套的if-elif条件结构来确定客户是否要订购->什么订单类别-？以下是该类别的什么产品->什么尺寸->什么数量

I am trying to program a decision tree to allow customers to order goods based on their input. So far, I have devised a nested if-elif conditional structure to decide if customer want to order --> what order category --? what product from that category --> what size --> what quantity

下面是该结构的一个示例，如果继续执行该过程，它将变得更加嵌套。我的问题是，是否可以通过决策树数据结构（例如收集用户输入的字典，然后使用递归算法遍历该字典以打印订单。如果是这样，将如何编码？

Below is a sample of the structure which would become more nested if I continued the process. My question is, could this be implemented via a decision tree data structure, e.g. a dictionary which gathers user inputs, and for this to be traversed using a recursive algorithm to print the order. If so, how would this be coded?

eatOrNo = input("Type yes to eat or no to cancel")

if eatOrNo == 'yes':
    category = input('Type Hot Drink or Cold Drink or Food')
    if category == 'Hot Drink':
        hotDrink = input("Espresso or Cappucino")
    elif category == 'Cold Drink':
        coldDrink = input("Iced Coffee or Iced Tea")
    elif category == 'Food':
        coldDrink = input("Toast or Sandwich")
else:
    print('error')

elif eatOrNo == 'no':
    print('cancelled')

else:
    print('error')

推荐答案

这是一个示例：

>>> dict = {"first":"1", "second":"2"}
>>> dict
{'first': '1', 'second': '2'}
>>> dict["first"] = 2
>>> dict
{'first': 2, 'second': '2'}

如果您想将输入添加为键，就可以：

If you want to add the input as a key you can:

>>> dict["third"] = "3"
>>> dict
{'first': 2, 'second': '2', 'third': '3'}

Idk，如果这正是您想要的，但应该给您一个提示：
另外，您在 else 之后还有一个 elif 和一个副本其他。

Idk if this is what you wanted exactly but should give you an idea: Also you had an elif after else and a duplicate else in your main if/else.

empty_dict = {}

eatOrNo = input("Type yes to eat or no to cancel")

if eatOrNo == 'yes':
    empty_dict["eatOrno"] = "yes"
    category = input('Type Hot Drink or Cold Drink or Food')
    if category == 'Hot Drink':
        empty_dict["category"] = 'Hot Drink'
        hotDrink = input("Espresso or Cappucino")
        empty_dict["Food"] = coldDrink
    elif category == 'Cold Drink':
        empty_dict["category"] = 'Cold Drink'
        coldDrink = input("Iced Coffee or Iced Tea")
        empty_dict["Food"] = coldDrink
    elif category == 'Food':
        empty_dict["category"] = 'Food'
        coldDrink = input("Toast or Sandwich")
        empty_dict["Food"] = coldDrink
elif eatOrNo == 'no':
    print('cancelled')

else:
    print('error')


print(empty_dict)

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