虽然循环没有迭代数组中的正确解决方案

Question

我的目标：我试图让用户输入他们自己的查询以获取故障排除系统。如果用户的输入具有在“关键字”数组中找到的关键字，则从“答案”数组中的相同索引给出解决方案。

问题：没有语法错误，而是逻辑错误。对于 'keywords' 数组中的第一个和第二个索引，如果输入了这个关键字，则给出正确的解决方案。但是，对于 'keywords' 数组中的第三个和第四个索引，它会从 'answers' 数组中的不同索引输出错误的解决方案。

我的代码：

answers = ['dry it out','replace screen','delete any apps that are not needed','restart it']
keywords = ['wet','cracked','download','unresponsive']
i = 0
while i <= 5:
    user_query = str(input('What\'s the problem?\n>> ')).lower()
    for keyword in keywords:
        while keyword[i] not in user_query:
            i = i + 1
        if keyword[i] in user_query:
            print(answers[i])
            i = 10
            break
        if i >= 5:
            print('contact the supplier')
            break

Answer 1

您必须记住，在for keyword in keywords: 中，关键字是一个字符串，通过i 对其进行索引是提取单个字母。相反，你想做这样的事情：

for keyword in keywords:
    if keyword in user_query:
        # Handle things here

或

for i in range(len(keywords)):
    if keyword[i] in user_query:
         # Handle things here

第二种方法将允许您引用answers 数组中的相应条目，所以这是我推荐的。

您仍然需要清理并确保用户在代码中的正确位置输入查询。我的猜测是您想要的代码（尽管您应该验证）是：

answers = ['dry it out','replace screen','delete any apps that are not needed','restart it']
keywords = ['wet','cracked','download','unresponsive']
user_query = str(input('What\'s the problem?\n>> ')).lower()


for i in range(len(keywords)):
    if keyword[i] in user_query:
        print(answers[i])
        break
else:
    print('contact the supplier')

此代码使用附加到for 循环的else 块。要了解发生了什么，我建议您阅读它们here。

Answer 2

answers = ['dry it out','replace screen','delete any apps that are not needed','restart it']
keywords = ['wet','cracked','download','unresponsive']

query = input('What\'s the problem?\n>> ').lower()

try:
    print(answers[keywords.index(query)])
except ValueError:
    print("Contact the supplier.")

这是另一个使用内置索引函数的列表而不需要 for 循环的选项。

Answer 3

我认为这可能会更好一些：

answers = ['dry it out','replace screen','delete any apps that are not needed','restart it']
keywords = ['wet','cracked','download','unresponsive']
responses = {k:v for k,v in zip(keywords,answers)}

def getAnswer(query, solutions):
    for keyword in solutions:
        if keyword in query:
            return solutions[keyword]
    return "Contact the supplier"

user_query = str(input('What\'s the problem?\n>> ')).lower()
print(getAnswer(user_query,responses))

示例输出：

What's the problem?
>> screen cracked
replace screen