I want to change all of the number in my array into ABCD scoring system using python-CodePudding

I want to change all the number in my array into ABCD scoring system. I have 100 X 1 array of scores, my array is put under total_score. I tried using

def grade(score):
    if 91 <= score <= 100:
        return 'A'
    if 81 <= score <= 90.99:
        return 'B'
    if 71 <= score <= 80.99:
        return'C'
    if 61 <= score <= 70.99:
        return'D'
    else:
        return'E'
grade = float(total_score)

I also tried using


def determine_grade(scores, breakpoints=[50, 60, 70, 80, 90], grades='FEDCBA'):
    i = bisect.bisect(breakpoints, scores)
    return grades[i]
    [grade(score) for score in [total_score]]

both doesnt work. There are also few suggestion, but it seems none of the suggestion work with pandas array

CodePudding user response：

Let's say your total scores array looks like this:

total_scores = ['99', '100', '52', '69', '33', '77']

Your grading function:

def grade(score):
    if 91 <= score <= 100:
        return 'A'
    if 81 <= score <= 90.99:
        return 'B'
    if 71 <= score <= 80.99:
        return'C'
    if 61 <= score <= 70.99:
        return'D'
    else:
        return'E'

Then all you have to do is:

grading_score = [grade(float(score)) for score in total_scores]  # returns ['A', 'A', 'E', 'D', 'E', 'C']

Note that I'm converting the strings in my array into floats before calling the 'grade' function.

Here is the official documentation for using list comprehensions