serialization and deserialization done

exceptions.py

@@ -1,22 +0,0 @@
-class NotANumberException(Exception):
-    pass
-
-
-class SubjectNotExistingException(Exception):
-    pass
-
-
-class CategoryNotExistingException(Exception):
-    pass
-
-
-class WrongCaseException(Exception):
-    pass
-
-
-def convertible(string):
-    try:
-        float(string)
-        return True
-    except ValueError:
-        raise NotANumberException

main.py

@@ -2,13 +2,20 @@ import subject
 import user_IO
 import serializer
 import encryption
-import exceptions
 import os
 
 subjects = []
+filepath = "/data/user.grades"
 try:
+    password = user_IO.password()
+    if os.path.isfile(filepath):
+        with open(filepath, 'r') as file:
+            string = encryption.decrypt(password, file.read())
+            serializer.deserialize(string)
+
+
+
     while True:
-        try:
         user_input = user_IO.user_input()
         input_or_output = user_input[0]
         if input_or_output == "input":
@@ -31,25 +38,16 @@ try:
                 _main = user_input[3]
                 _oral = user_input[4]
                 subjects.append(subject.Subject(_subject, _main, _oral))
-                else:
-                    raise exceptions.WrongCaseException
         elif input_or_output == "output":
             _subject = user_input[1]
             subject_get = subject.get_subject(subjects, _subject)
-                user_IO.user_output(subject_get.name, subject_get.return_grade_categories(),
-                                [subject_get.return_average_of_category(i) for i in subject_get.return_grade_categories()],
-                                subject_get.return_average_of_subject())
+            user_IO.user_output(subject_get.return_average_subject)
         elif input_or_output == "exit":
             break
-            else:
-                raise exceptions.WrongCaseException
-
-        except (exceptions.NotANumberException, exceptions.CategoryNotExistingException,
-                exceptions.SubjectNotExistingException, exceptions.WrongCaseException) as e:
-            user_IO.exception_raised(e)
-
-    
+    with open(filepath, 'w') as file:
+        _list = [serializer.serialize(_subject) for _subject in subjects]
+        string = encryption.encrypt(password, str(_list))
+        file.write(string)
 
 except Exception as e:
     print('ERROR' + str(e))
-    raise

serializer.py

@@ -2,23 +2,48 @@ import json
 import subject
 
 
-class TempSubject:
+class TempSubjectSerialize:
+    def __init__(self, _subject):
+        self.name = _subject.name
+        self.main_subject = str(_subject.main_subject)
+        self.oral_exam = str(_subject.oral_exam)
+        self.grades = {}
+        for category in _subject.grades:
+            self.grades[category] = {}
+            for counter, grade in enumerate(_subject.grades[category][0]):
+                self.grades[category][str(counter)] = {
+                    "grade": str(grade.grade),
+                    "name": str(grade.name),
+                    "date": str(grade.date)
+                }
+            self.grades[category]["rating"] = _subject.grades[category][1]
+
+    def get_string(self):
+        string = self.__dict__
+        string = str(string)
+        string = string.replace("'", '"')
+        return string
+
+
+class TempSubjectDeserialize:
     def __init__(self, string):
         self.__dict__ = json.loads(string)
 
 
-def serialize(subject):
-    string = subject.__dict__
-    for category in string["grades"]:
-        for counter, grade in enumerate(string["grades"][category][0]):
-            string["grades"][category][0][counter] = grade.__dict__
+def serialize(_subject):
+    ser = TempSubjectSerialize(_subject)
+    string = ser.get_string()
     return str(string)
 
 
 def deserialize(string):
-    temp = TempSubject(string)
+    temp = TempSubjectDeserialize(string)
     _subject = subject.Subject(temp.name, bool(temp.main_subject), bool(temp.oral_exam))
     for category in temp.grades:
-        _subject.add_grade_category(category, temp.grades[category][1])
+        _subject.add_grade_category(category, temp.grades[category]['rating'])
+        for grade in temp.grades[category]:
+            if grade != "rating":
+                _subject.add_grade(category, subject.Grade(float(temp.grades[category][grade]["grade"]),  # the grade
+                                                           temp.grades[category][grade]["name"],  # the name of grade
+                                                           temp.grades[category][grade]["date"]))  # the date of grade
     return _subject
-

subject.py

@@ -1,5 +1,4 @@
 from datetime import datetime as str_date
-from exceptions import SubjectNotExistingException, CategoryNotExistingException
 
 
 class Subject:
@@ -19,25 +18,19 @@ class Subject:
         return self.grades[category][0]
 
     def return_grade_categories(self):  # Return all categories
-        return self.grades
+        return [i for i in self.grades]
 
     def return_average_of_category(self, category):  # Return average of one categorie
-        _list = [int(i.grade) for i in self.grades[category][0]]
-        return sum(_list) / len(self.grades[category][0])
+        return sum(self.grades[category][0]) / len(self.grades[category][0])
 
     def return_average_of_subject(self):
         rating_sum = 0
         grade_sum = 0
         for i in self.grades:
             rating_sum += self.grades[i][1]
-            grade_sum += self.return_average_of_category(i)*self.grades[i][1]
+            grade_sum += self.return_average_of_category(i)
         return grade_sum / rating_sum
 
-    def category_existing(self, category):
-        if category in self.grades:
-            return True
-        raise CategoryNotExistingException
-
 
 class Grade:
     def __init__(self, grade, name, date=str(str_date.now())):
@@ -50,4 +43,4 @@ def get_subject(liste, name):
     for subject in liste:
         if subject.name == name:
             return subject
-    raise SubjectNotExistingException
+    return None

test.json

@@ -0,0 +1 @@
+{"name": "Deutsch", "main_subject": "False", "oral_exam": "True", "grades": {"schriftlich": {"0": {"grade": "13", "name": "KA1", "date": "2019-08-04 08:25:17.797803"}, "1": {"grade": "9", "name": "KA2", "date": "2019-08-04 08:25:17.797803"}, "rating": 2}, "mündlich": {"0": {"grade": "12", "name": "mündl 1. HJ", "date": "2019-08-04 08:25:17.797803"}, "rating": 1}}}

user_IO.py

@@ -1,6 +1,3 @@
-import exceptions
-
-
 def user_input():
     todo = input("Ok, do you want to see them or to edit them [see/edit/exit]?\n")
     if todo == "see":
@@ -17,28 +14,22 @@ def user_input():
                 main_subject = True
             elif main_subject == 'n':
                 main_subject = False
-            else:
-                raise exceptions.WrongCaseException
             oral_exam = input("Will there be an oral exam in this subject [y/n]? \n")
             if oral_exam == 'y':
                 oral_exam = True
             elif oral_exam == 'n':
                 oral_exam = False
-            else:
-                raise exceptions.WrongCaseException
             return "input", "subject", subject, main_subject, oral_exam
         elif user_add == "category":
             subject = input("To which subject do you want to add the category? \n")
             category = input("Which category do you want to add? \n")
             rating = float(input("Rating? \n"))
-            if exceptions.convertible(rating):
             return "input", "category", subject, category, rating
         elif user_add == "grade":
             subject = input("To which subject do you want to add the grade? \n")
             category = input("To which category do you want to add it? \n")
             grade = input("Grade? \n")
             grade_name = input("What's the name of the grade? \n")
-            if exceptions.convertible(grade):
             return "input", "grade", subject, category, grade, grade_name
     elif todo == "exit":
         return "exit"
@@ -49,19 +40,12 @@ def user_output(subject, categories, average, average_subject):
     for counter, category in enumerate(categories):
         print("The average in {} is {} with these grades:".format(category, average[counter]))
         string = ""
-        for grade in categories[category][0]:
-            string += str(grade.grade) + ", "
+        for grade in categories[category]:
+            string += str(grade) + ", "
         print(string + "\n")
         print("The average of {} is {}.".format(subject, average_subject))
 
 
-def exception_raised(exception):
-    print("Dear user you've raised an exception. The cause of the exception is:")
-    if exception is exceptions.SubjectNotExistingException:
-        print("The subject you tried to access is not created")
-    elif exceptions is exceptions.CategoryNotExistingException:
-        print("The category you tried to add something is non-existent in this subject")
-    elif exception is exceptions.NotANumberException:
-        print("The number you gave the program is not a number")
-    elif exception is exceptions.WrongCaseException:
-        print("This was not one of the available choices")
+def password():
+    print("What is your password?")
+    return input()