Python函数始终缺少所需的参数,尽管已编写。

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英文:

Python function keeps missing required argument, despite being written

问题

我试图让一个按钮传递一个函数,并已经添加了将要使用的变量(以避免使用全局变量),然而,尽管我已经编写了它,但我一直得到一个缺少位置参数的错误。

def ShowQuestion(quiz, instance, questionsAnswered, questionsdone, question, user_answer, check_answer, data):
    
    user_answer.focus_set()
    if instance == 0:
        
        question_set = random.sample(data, 5)
    
    questionask = random.choice(question_set)
        
    current_question = questionask['question']
        
    question.config(text=current_question)
    
    question_set.remove(questionask)
    
    check_answer.config(command=lambda: Question.Checkanswer(quiz, instance, questionsAnswered, questionsdone, question, user_answer))
    check_answer.grid(row=5, column=3)
    
    
def Checkanswer(quiz, choicer, instance, questionsAnswered, questionsdone, question, user_answer):
    #print(choicer)
    questionsdone += 1
    if type(user_answer.get()) == str:
        user_answer = str(user_answer.get()).lower()
    else:
        user_answerwrong = user_answer.get()

    if user_answer in question_answer:
        correct_question += 1
    else:
        pass
    
    if questionsAnswered == 5:
        messagebox.showwarning("Final Score", "Game Over \n Final Score: %s \n" %(self.user_score))
        quiz.destroy()
    else:
        instance += 1
        user_answer.delete(0, 'end')
        Question.ShowQuestion(quiz, instance, questionsAnswered, questionsdone, question, user_answer, check_answer, data)
英文:

I am trying to have a button pass a function, and have put in the variables that will be used (to avoid globals), however, I keep getting the error that I am missing a positional argument, despite the fact that I have already written it.

def ShowQuestion(quiz, instance, questionsAnswered, questionsdone, question, user_answer, check_answer, data):
    
    user_answer.focus_set()
    if instance == 0:
        
        question_set = random.sample(data,5)
    
    questionask = random.choice(question_set)
        
    current_question = questionask['question']
        
    question.config(text=current_question)
    
    question_set.remove(questionask)
    
    check_answer.config(command = lambda : Question.Checkanswer(quiz, instance, questionsAnswered, questionsdone, question, user_answer))
    check_answer.grid(row = 5, column = 3)
    
    
def Checkanswer(quiz, choicer, instance, questionsAnswered, questionsdone, question, user_answer):
    #print (choicer)
    questionsdone += 1
    if type(user_answer.get()) == str:
        user_answer = str(user_answer.get()).lower()
    else:
        user_answerwrong = user_answer.get()

    if user_answer in question_answer:
        correct_question +=1
    else:
        pass
    
    if questionsAnswered == 5:
        messagebox.showwarning("Final Score","Game Over \n Final Score: %s \n" %(self.user_score))
        quiz.destroy()
    else:
        instance +=1
        user_answer.delete(0, 'end')
        Question.ShowQuestion(quiz, instance, questionsAnswered, questionsdone, question, user_answer, check_answer, data)

答案1

得分: 2

在这个 lambda 函数调用的参数列表与函数定义之间存在不匹配 (6 个参数):

    check_answer.config(command = lambda : Question.Checkanswer(quiz, instance, questionsAnswered, questionsdone, question, user_answer))

和函数定义 (7 个参数):

def Checkanswer(quiz, choicer, instance, questionsAnswered, questionsdone, question, user_answer):

你忽略了 choicer 参数。要么传递它,要么从函数定义中删除这个参数(因为在函数体中没有使用它)。

注意:没有提供你的其余代码,我不确定如何解释 Question 对象——它是一个模块、某种方式引用本地文件范围还是一个类。因此,我假设 Question.Checkanswer 是指给定的函数 Checkanswer

英文:

There is a mismatch between the argument list in the function called by this lambda function (6 arguments):

    check_answer.config(command = lambda : Question.Checkanswer(quiz, instance, questionsAnswered, questionsdone, question, user_answer))

and the function definition (7 arguments):

def Checkanswer(quiz, choicer, instance, questionsAnswered, questionsdone, question, user_answer):

You skipped over the choicer argument. Either pass it or remove the argument from the function definition (seeing as you don't use it in the function body).

Note: Without the rest of your code, I'm not sure how to interpret the Question object—whether it is a module, somehow referring to the local file scope, or a class. So I assumed that Question.Checkanswer refers to the given function Checkanswer.

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  • 本文由 发表于 2020年1月6日 21:05:00
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