Calculates Pass/Fail ratios on preliminary results released by RHUL.

PassFailParse.py

class Subject:

    passes = 0
    fails = 0

    def pass_(self):
        self.passes += 1

    def fail(self):
        self.fails += 1

    def print_count(self):
        print(str(self.passes) + "P:" + str(self.fails) + 'F\n')

    def get_pass_percentage(self):
        if (self.passes + self.fails) == 0:
            return 0
        return (float(self.passes) / (float(self.passes) + float(self.fails)))*100


with open('results.txt', 'r') as results_file:
    results_lines = results_file.readlines()


current_subject_index = 0
current_grade_index = 8

subjects = dict()


while current_grade_index < results_lines.__len__() and current_subject_index < results_lines.__len__():

    current_subject = results_lines[current_subject_index]
    current_grade = results_lines[current_grade_index]

    # Evaluating Pass/Fail
    if current_subject not in subjects:
        subjects[current_subject] = Subject()

    if current_grade == 'Pass\n':
        subjects[current_subject].pass_()
    elif current_grade == 'Fail\n':
        subjects[current_subject].fail()
    else:
        print("Error identifying: " + current_grade)

    current_subject_index += 1
    current_grade_index += 1

    # Checking if indexes have advanced into next block of grades/results
    while current_subject_index < results_lines.__len__() and results_lines[current_subject_index][0] != 'C' and results_lines[current_subject_index][0] != 'I':
        current_subject_index += 1

    while current_grade_index < results_lines.__len__() and results_lines[current_grade_index][0] != 'P' and results_lines[current_grade_index][0] != 'F':
        current_grade_index += 1

# Printing results
for key in subjects:
    print("Subject: " + key + str(subjects[key].get_pass_percentage()) + "% of students passed")
    subjects[key].print_count()