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1.py

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+from time import sleep
+
+
+class TrafficLight():
+    def __init__(self):
+        self.__color = 'red'
+
+    def running(self):
+        '''run TrafficLight and printin color'''
+        print('start running')
+        print(self.__color)
+        sleep(7)
+        self.new_color()
+        print(self.__color)
+        sleep(2)
+        self.new_color()
+        print(self.__color)
+        sleep(5)
+        print('stop running')
+
+    def new_color(self):
+        '''check and set color'''
+        if self.__color == 'red':
+            self.__color = 'yellow'
+        elif self.__color == 'yellow':
+            self.__color = 'green'
+        elif self.__color == 'green':
+            self.__color = 'red'
+        else:
+            raise ValueError('color error')
+
+
+t = TrafficLight()
+t.running()

2.py

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+class Road():
+    def __init__(self, length, width):
+        self._length = length
+        self._width = width
+        self.bulk = 5  # задать толщину по умолчанию 5 см
+        self.mass = 0.025  # задать массу в тоннах на 1 см толщины
+
+    def calculation_1_meter(self):
+        return self.bulk*self.mass
+
+    def сalculation(self):
+        '''calculation mass asphalt'''
+        res = self._length * self._width * self.calculation_1_meter()
+        return res
+
+
+r = Road(5000, 20)
+print(r.сalculation())

3.py

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+
+class Worker():
+    income = {'wage': 100, 'bonus': 20}
+
+    def __init__(self, name, surname, position):
+        self.name = name
+        self.surname = surname
+        self.position = position
+
+
+class Position(Worker):
+    def __init__(self, name, surname, position):
+        super().__init__(name, surname, position)
+
+    def get_full_name(self):
+        print(f'{self.name} {self.surname}')
+
+    def get_total_income(self):
+        res = self.income['wage']*self.income['bonus']
+        print(f' full income {res}')
+
+
+pos = Position('Виктор', 'Петров', 'Програмист')
+pos.get_full_name()
+pos.get_total_income()
+print(pos.income)

4.py

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+class Car():
+    count_cars = 0
+
+    def __init__(self, color, name, speed, is_police=False):
+        Car.count_cars += 1
+        self.speed = speed
+        self.color = color
+        self.name = name
+        self.is_police = is_police
+
+    def go(self):
+        print(f'car {self.name} go')
+
+    def stop(self):
+        print('stop')
+
+    def turn(self, direction):
+        print(f'car {self.name} turn {direction}')
+
+    def show_speed(self):
+        print(f'car {self.name} have speed now {speed}')
+
+    def show_count_cars(self):
+        print(Car.count_cars)
+
+
+class TownCar(Car):
+    def __init__(self, color, name, speed, is_police=False):
+        super().__init__(color, name, speed, is_police)
+
+    def show_speed(self):
+        if self.speed > 60:
+            print('excess speed!!!!!  ', end='')
+        print(f'speed now {self.speed}')
+
+
+class SportCar(Car):
+    def __init__(self, color, name, speed, is_police=False):
+        super().__init__(color, name, speed, is_police)
+
+
+class WorkCar(Car):
+    def __init__(self, color, name, speed, is_police=False):
+        super().__init__(color, name, speed, is_police)
+
+    def show_speed(self):
+        if self.speed > 40:
+            print('excess speed!!!!!')
+        print(f'speed now {self.speed}')
+
+
+class PoliceCar(Car):
+    def __init__(self, color, name, speed):
+        super().__init__(color, name, speed, is_police=True)
+
+
+sport = SportCar('red', 'bugatti', speed=150)
+town = TownCar('grey', 'lada', speed=90)
+work = WorkCar('green', 'man', speed=70)
+police = PoliceCar('white', 'ford', speed=120)
+sport.go()
+town.show_speed()
+print(police.is_police)
+
+
+town.show_count_cars()

5.py

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+class Stationery():
+    count_stationery = 0
+
+    def __init__(self, title):
+        Stationery.count_stationery += 1
+        self.title = title
+
+    def draw(self):
+        print('start draw')
+
+
+class Mod_Stationery(Stationery):  # чтобы не перегружать методы в каждом классе добавил мод
+    def __init__(self, title):
+        super().__init__(title)
+
+    def draw(self):
+        print(f'start draw by {self.title}')
+
+
+class Pen(Mod_Stationery):
+    def __init__(self):
+        super().__init__('pen')
+
+    def draw(self):
+        print(f'PEN start draw by {self.title}')  # но можно и перегрузить в каждом классе как по заданию
+
+
+class Pencil(Mod_Stationery):
+    def __init__(self):
+        super().__init__('pencil')
+
+
+class Handle(Mod_Stationery):
+    def __init__(self):
+        super().__init__('handle')
+
+
+pn = Pen()
+pl = Pencil()
+hl = Handle()
+
+pn.draw()
+pl.draw()
+hl.draw()