Question

我正在尝试让以下程序显示输出中可用的水果数量，而不是显示水果的名称，但我无法找出原因。我该如何纠正？

基本上，程序会生成一个从1到5的随机数，如果生成的数字低于3（1或2），则它不可用，如果3及以上，则可用。

import random

class Queue:
    def __init__(self):
        self.container = []

    def __len__(self):
        return len(self.container)

    def is_empty(self):
        return len(self) == 0

    def enqueue(self, item):
        self.container.append(item)

    def dequeue(self):
        return self.container.pop(0)

    def peek(self) :
        return self.container[0]

    def __iter__(self):
        return iter(self.container)

fruits = ["Apple", "Orange", "Pear", "Watermelon"]
q = Queue()

temp = fruits.copy()

fruits = ["Apple", "Orange", "Pear", "Watermelon"]
d = {fruit: random.randint(1, 5) for fruit in fruits}
unavailable = [fruit for fruit in d if d[fruit] < 3]
available = [fruit for fruit in d if d[fruit] >= 3]


for fruit in fruits:
    if random.randint(1, 5) < 3:
        unavailable.append(fruit)
    else:
        available.append(fruit)

percent_available = len(available) / (len(available) + len(unavailable)) * 100

for fruit in temp:
    q.enqueue(fruit)

    print(fruit)

    numgen = random.randint(1, 5)
    if(numgen >= 3):
        print("Item is available")
    else:
        print("Item is unavailable")

print("The following items are unavailable")
print(unavailable)
print('Number of fruits available = ' + str(available))
print('Percentage of fruits available = ' + str(percent_available))

输出

Apple
Item is unavailable
Orange
Item is available
Pear
Item is unavailable
Watermelon
Item is available
The following items are unavailable
['Apple', 'Watermelon', 'Apple', 'Watermelon']
Number of fruits available = ['Orange', 'Pear', 'Orange', 'Pear']
Percentage of fruits available = 50.0

Answer 1

更改此行：

print('Number of fruits available = ' + str(available))

到这一行：

print('Number of fruits available = {}'.format(len(available)))

输出：

Apple
Item is unavailable
Orange
Item is unavailable
Pear
Item is unavailable
Watermelon
Item is available
The following items are unavailable
['Apple', 'Orange', 'Pear']
Number of fruits available = 5
Percentage of fruits available = 62.5

在列表中显示计数而不是项目名称（Python）

1 个答案: