Making the Grade.py

"""Functions for organizing and calculating student exam scores."""
def round_scores(student_scores):
    """Round all provided student scores.
 
    :param student_scores: list - float or int of student exam scores.
    :return: list - student scores *rounded* to nearest integer value.
    """
    for i in range(len(student_scores)):
        student_scores[i] = round(student_scores[i])
    return student_scores
def count_failed_students(student_scores):
    """Count the number of failing students out of the group provided.
 
    :param student_scores: list - containing int student scores.
    :return: int - count of student scores at or below 40.
    """
    count = 0
    for grade in student_scores:
        if grade <= 40:
            count += 1
    return count
def above_threshold(student_scores, threshold):
    """Determine how many of the provided student scores were 'the best' based on the provided threshold.
 
    :param student_scores: list - of integer scores.
    :param threshold: int - threshold to cross to be the "best" score.
    :return: list - of integer scores that are at or above the "best" threshold.
    """
    result = []
    for grade in student_scores:
        if grade >= threshold:
            result.append(grade)
    return result
    
def letter_grades(highest):
    """Create a list of grade thresholds based on the provided highest grade.
 
    :param highest: int - value of highest exam score.
    :return: list - of lower threshold scores for each D-A letter grade interval.
            For example, where the highest score is 100, and failing is <= 40,
            The result would be [41, 56, 71, 86]:
 
            41 <= "D" <= 55
            56 <= "C" <= 70
            71 <= "B" <= 85
            86 <= "A" <= 100
    """
    result = []
    for i in range(4):
        result.append(41 + i * ((highest - 40)//4))
    return result
def student_ranking(student_scores, student_names):
    """Organize the student's rank, name, and grade information in ascending order.
 
    :param student_scores: list - of scores in descending order.
    :param student_names: list - of string names by exam score in descending order.
    :return: list - of strings in format ["<rank>. <student name>: <score>"].
    """
    result = []
    for i in range(len(student_scores)):
        result.append(str(i + 1) + ". " + str(student_names[i]) + ": " + str(student_scores[i]))
    return result
def perfect_score(student_info):
    """Create a list that contains the name and grade of the first student to make a perfect score on the exam.
 
    :param student_info: list - of [<student name>, <score>] lists.
    :return: list - first `[<student name>, 100]` or `[]` if no student score of 100 is found.
    """
    for info in student_info:
        if info[1] == 100:
            return info
    return []