Question

What's wrong with this Python code?

def scale_midterm_grades(grades: List[float], multiplier: float, bonus: float) -> None:
   """Modify each grade in grades by multiplying it by multiplier and then adding bonus. Cap grades at 100.
   >>> grades = [45, 50, 55, 95]
   >>> scale_midterm_grades(grades, 1, 10)
   >>> grades
   [55, 60, 65, 100]
   """
   for grade in grades:
       grade = grade*multiplier + bonus
       if grade > 100:
           grade = 100

Answer 1

There are two mistakes in the above python program.

1)In python,You don't have to decare datatype of the variables. Python will take it directly based on the value you give as an input.

    def scale_midterm_grades(grades: List[float], multiplier: float, bonus: float) -> None: must be replaced with def scale_midterm_grades(grades,multiplier,bonus):

2)While using lists, you can modify the values in the list using INDEXING ,we cannot directly modify the values.

    for grade in grades:
       grade = grade*multiplier + bonus
       if grade > 100:
           grade = 100

The above code must be replaced with the following code:

    for i in range(0,len(grades)):
       grades[i] = grades[i]*multiplier + bonus
       if grades[i] > 100:
           grades[i] = 100

Modified Code

def scale_midterm_grades(grades,multiplier,bonus):
    for i in range(0,len(grades)):
       grades[i] = grades[i]*multiplier + bonus
       if grades[i] > 100:
           grades[i] = 100
   

    return grades

grades = [45, 50, 55, 95]
l=scale_midterm_grades(grades, 1, 10)
print(l)

OUTPUT

File Edit Shell Debug Options Window Help Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:06:47) [MSC v.1914 32 bit (Intel) ] on win32 Type "copyright", "credits" or "1icense (" for more information File Edit Format Run Options Window Help def scale midterm grades (grades,multiplier, bonus) for ge , l tmultiplier bonus = RESTART: C:/Users/shrav/AppData/ Local/ Programs/ Python/Python37 -32/scale.py= [55, 60, 65, 100] if grades [i] > 100: grades i =100 return grades grades [45, 50, 55, 951 1-scale_midterm_grades (grades, 1, 10) print (1)