调用函数执行数据树

Question

我已经有了加权分数代码。

def weighted_total_score(student_scores):
    return((int(student_scores[0])*mid_1_weight)+(int(student_scores[1])*mid_2_weight)+(int(student_scores[2])*final_exam_weight)+(int(student_scores[3])*homework_weight)+(int(student_scores[4][0])*lab_weight)+(int(student_scores[5])*pr_1_weight)+(int(student_scores[6])*pr_2_weight)+(int(student_scores[7])*pr_3_weight)+(int(student_scores[8])*participation_weight))

我想在我的新函数 overall_grade 中调用 weighted_score。我如何调用 weighted_score 以便它给我正确的答案？当前，当我的代码被执行时，例如，我得到的是 F 而不是 C。

def overall_grade(weighted_total_score):
    weighted_total_score=int()
    if (weighted_total_score >=93):
        print("The overall student grade is A")

    elif (90<=weighted_total_score<93):
        print("The overall student grade is A-")

    elif (87<=weighted_total_score<90):
        print("The overall student grade is B+")


    elif (83<=weighted_total_score<87):
        print("The overall student grade is B")


    elif (80<=weighted_total_score<83):
        print("The overall student grade is B-")


   elif (77<=weighted_total_score<80):
        print("The overall student grade is C+")


   elif (73<=weighted_total_score<77):
        print("The overall student grade is C")


   elif (70<=weighted_total_score<73):
        print("The overall student grade is C-")



   elif (67<=weighted_total_score<70):
        print("The overall student grade is D+")



  elif (63<=weighted_total_score<67):
       print("The overall student grade is D")



  elif (60<=weighted_total_score<63):
       print("The overall student grade is D-")



  elif (weighted_total_score<60):
      print("The overall student grade is F")

Answer 1

问题是

weighted_total_score=int()

这将使 weighted_total_score 变为 0

应该是

wt_score=weighted_total_score(student_scores)

同时将变量名从 weighted_total_score 更改为其他名称，因为该函数已有该名称

Answer 2

How do i call weighted_score?

您可以像调用任何其他方法一样调用它...

def overall_grade(scores):
    score = weighted_total_score(scores)

注意不要将您的变量或参数命名为 weighted_total_score，因为您已经有一个使用该名称的方法。如果你引用你的局部变量，他们会 shadow 那个方法，这通常不好并且会给初学者带来困惑。

你得到 F 的原因是因为 weighted_total_score=int() 与 weighted_total_score=0 相同，并且你的 if 语句一直到底部。

此外，提示，实际上您的条件中不需要两个边界，因为条件可以 "fall through"。

还有一个建议，尝试编写简单的方法，然后在它们之上构建。不要一次做太多。例如，制作一个仅 returns 字母等级的方法，然后使用打印字符串并使用其他方法的结果的方法。

def get_letter_grade(score):
    if (93 <= score):
        return "A"
    elif (90 <= score): # already < 93
        return "A-"
    elif (87 <= score): # already  < 90
        return "B+"
    # ... etc
    else:               # < 60
        return "F"

def overall_grade(scores):
    weighted_score = weighted_total_score(scores)
    print("The overall grade is {}".format(get_letter_grade(weighted_score)))

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