Added Static and Class Methods - Exercise and Polymorphism and Abstraction - Lab

Author: MitkoVtori

OOP/5.Static and Class Methods/Static and Class Methods - Exercise/01. Photo Album.py

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+from math import ceil
+
+
+class PhotoAlbum:
+
+    def __init__(self, pages):
+        self.pages = pages
+        self.photos = [[] for _ in range(pages)]
+
+    @classmethod
+    def from_photos_count(cls, photos_count):
+        return cls(ceil(photos_count / 4))
+
+    def add_photo(self, label):
+        for row in range(len(self.photos)):
+            if len(self.photos[row]) < 4:
+                self.photos[row].append(label)
+                print(self.photos)
+                return f"{label} photo added successfully on page {row + 1} slot {len(self.photos[row])}"
+
+        return "No more free slots"
+
+    def display(self):
+        photos = ["-" * 11]
+
+        for row in self.photos:
+            photos.append(("[] " * len(row)).rstrip())
+            photos.append("-" * 11)
+
+        return '\n'.join(photos)
+

OOP/5.Static and Class Methods/Static and Class Methods - Exercise/02. Movie World/project.zip

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+class Customer:
+
+    def __init__(self, name, age, id):
+        self.name = name
+        self.age = age
+        self.id = id
+        self.rented_dvds = []
+
+    def __repr__(self):
+        return f"{self.id}: {self.name} of age {self.age} has {len(self.rented_dvds)} rented DVD's ({', '.join([dvd.name for dvd in self.rented_dvds])})"
+

OOP/6.Polymorphism and Abstraction/# TODO.txt renamed to OOP/5.Static and Class Methods/Static and Class Methods - Exercise/02. Movie World/project/__init__.py

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+from calendar import month_name
+
+
+class DVD:
+
+    def __init__(self, name, id, creation_year, creation_month, age_restriction):
+        self.name = name
+        self.id = id
+        self. creation_year = creation_year
+        self.creation_month = creation_month
+        self.age_restriction = age_restriction
+        self.is_rented = False
+
+    @classmethod
+    def from_date(cls, id, name, date, age_restriction):
+        day, month, year = [int(x) for x in date.split(".")]
+        return cls(name, id, year, month_name[month], age_restriction)
+
+    def __repr__(self):
+        return f"{self.id}: {self.name} ({self.creation_month} {self.creation_year}) has age restriction {self.age_restriction}. Status: {'rented' if self.is_rented else 'not rented'}"
+

OOP/5.Static and Class Methods/Static and Class Methods - Exercise/02. Movie World/project/customer.py

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+from project.customer import Customer
+from project.dvd import DVD
+
+
+class MovieWorld:
+
+    def __init__(self, name):
+        self.name = name
+        self.customers = []
+        self.dvds = []
+
+    @staticmethod
+    def dvd_capacity():
+        return 15
+
+    @staticmethod
+    def customer_capacity():
+        return 10
+
+    def add_customer(self, customer: Customer):
+        if len(self.customers) < self.customer_capacity():
+            self.customers.append(customer)
+
+    def add_dvd(self, dvd: DVD):
+        if len(self.dvds) < self.dvd_capacity():
+            self.dvds.append(dvd)
+
+    def rent_dvd(self, customer_id, dvd_id):
+        customer = [x for x in self.customers if x.id == customer_id][0]
+        dvd = [x for x in self.dvds if x.id == dvd_id][0]
+
+        if dvd in customer.rented_dvds:
+            return f"{customer.name} has already rented {dvd.name}"
+
+        if dvd.is_rented:
+            return "DVD is already rented"
+
+        if customer.age < dvd.age_restriction:
+            return f"{customer.name} should be at least {dvd.age_restriction} to rent this movie"
+
+        customer.rented_dvds.append(dvd)
+        dvd.is_rented = True
+
+        return f"{customer.name} has successfully rented {dvd.name}"
+
+    def return_dvd(self, customer_id, dvd_id):
+        customer = [x for x in self.customers if x.id == customer_id][0]
+        dvd = [x for x in self.dvds if x.id == dvd_id][0]
+
+        if dvd not in customer.rented_dvds:
+            return f"{customer.name} does not have that DVD"
+
+        customer.rented_dvds.remove(dvd)
+        dvd.is_rented = False
+
+        return f"{customer.name} has successfully returned {dvd.name}"
+
+    def __repr__(self):
+        return "\n".join([
+            *[str(c) for c in self.customers],
+            *[str(d) for d in self.dvds]
+        ])
+

OOP/5.Static and Class Methods/Static and Class Methods - Exercise/02. Movie World/project/dvd.py

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+class Category:
+
+    def __init__(self, id, name):
+        self.id = id
+        self.name = name
+
+    def edit(self, new_name):
+        self.name = new_name
+
+    def __repr__(self):
+        return f"Category {self.id}: {self.name}"
+

OOP/5.Static and Class Methods/Static and Class Methods - Exercise/02. Movie World/project/movie_world.py

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+class Document:
+
+    def __init__(self, id, category_id, topic_id, file_name):
+        self.id = id
+        self.category_id = category_id
+        self.topic_id = topic_id
+        self.file_name = file_name
+        self.tags = []
+
+    @classmethod
+    def from_instances(cls, id, category, topic, file_name):
+        return cls(id, category.id, topic.id, file_name)
+
+    def add_tag(self, tag_content):
+        if tag_content not in self.tags:
+            self.tags.append(tag_content)
+
+    def remove_tag(self, tag_content):
+        if tag_content in self.tags:
+            self.tags.remove(tag_content)
+
+    def edit(self, filename):
+        self.file_name = filename
+
+    def __repr__(self):
+        return f"Document {self.id}: {self.file_name}; category {self.category_id}, topic {self.topic_id}, tags: {', '.join(self.tags)}"
+