问蟒蛇随机抽样后的检验
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Stack Overflow用户

提问于 2017-09-30 00:22:20

回答 2查看 104关注 0票数 0

这是我的第一个小项目，也是第一个很抱歉的格式化问题。我有两个包含菜谱名称作为字符串的列表。我想问用户他们想要多少餐，然后随机选择。

然后，我想检查是否选择了一顿饭，并显示价格的膳食，我将存储在一个变量。

我的想法是将随机样本添加到新列表中，并通过if in语句检查内容。如果菜谱在新列表中，那么它将打印包含价格的变量。

然而，当我检查菜谱的新列表时，它并不认为它在列表中。有什么我错过的或者更好的方法吗？谢谢。

到目前为止我的代码是：

import random
Vegetarian = ["Jungle Curry", "Chickpea Curry", "Dhal", "Buddha Bowl", 
"Chickpea Salad", "Lazy Noodles", "Fry Up"]
Meat = ["Chilli", "Butter Chicken", "Lamb and Hummus"]

v = int(raw_input("How many vegetarian meals this week? > "))
m = int(raw_input("How many meaty meals? > "))

Veg1 = random.sample(Vegetarian, v)
Meat2 = random.sample(Meat, m)

veg_week = []
meat_week = []

veg_week.append(Veg1)
meat_week.append(Meat2)

jungle_curry = 10
chickpea_curry = 10

if "Jungle Curry" and "Chickpea Curry" in veg_week:
    print jungle_curry + chickpea_curry

python

list

random

回答 2

Stack Overflow用户

回答已采纳

发布于 2017-09-30 00:46:36

我会这样做的

import random

Vegetarian = ["Jungle Curry", "Chickpea Curry", "Dhal", "Buddha Bowl",
          "Chickpea Salad", "Lazy Noodles", "Fry Up"]
Meat = ["Chilli", "Butter Chicken", "Lamb and Hummus"]

v = int(raw_input("How many vegetarian meals this week? > "))
m = int(raw_input("How many meaty meals? > "))

Veg1 = random.sample(Vegetarian, v)
Meat2 = random.sample(Meat, m)

veg_week = []
meat_week = []

veg_week.append(Veg1)
meat_week.append(Meat2)

# put the prices of each in the list too 
Vegetarian_price = [10, 10, 10, 10, 10, 10, 10]
Meat_price = [20, 20, 20]

v_cost = 0
m_cost = 0
for i in range(len(Veg1)):
    v_cost += Vegetarian_price[Vegetarian.index(Veg1[i])]

for i in range(len(Meat2)):
    m_cost += Meat_price[Meat.index(Meat2[i])]

print v_cost,m_cost

票数 0

Stack Overflow用户

发布于 2017-09-30 00:35:38

你犯了几个错误，让我们重温一下：

random.sample的结果是一个列表；当您调用veg_week.append(Veg1‘)时，您将创建一个列表列表。
在此之后，将10值赋值给jungle_curry和chickpea_curry。
然后，您将检查"Jungle Curry"和"Chickpea Curry"是否都在所选的示例中；也许您想逐一检查这些是否在本周的菜单中？

这应该更好地发挥作用：

import random

Vegetarian = ["Jungle Curry", "Chickpea Curry", "Dhal", "Buddha Bowl", 
"Chickpea Salad", "Lazy Noodles", "Fry Up"]
Meat = ["Chilli", "Butter Chicken", "Lamb and Hummus"]

v = int(input("How many vegetarian meals this week? > "))
m = int(input("How many meaty meals? > "))

Veg1 = random.sample(Vegetarian, v)
Meat2 = random.sample(Meat, m)

if "Jungle Curry" and "Chickpea Curry" in veg1:
    print(jungle_curry + chickpea_curry)