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Vehicle.py

+class Vehicle(object):
+
+    def __init__(self, speed=0):
+        self.speed = speed
+        self.odometer = 0
+        self.time = 0
+
+    def say_state(self):
+        print("I'm going {} kph!".format(self.speed))
+
+    def accelerate(self):
+        self.speed += 5
+
+    def brake(self):
+        if self.speed < 5:
+            self.speed = 0
+        else:
+            self.speed -= 5
+
+    def step(self):
+        self.odometer += self.speed
+        self.time += 1
+
+    def average_speed(self):
+        if self.time != 0:
+            return self.odometer / self.time
+        else:
+            pass
+
+
+if __name__ == '__main__':
+
+    my_car = Car()
+    print("I'm a car!")
+    while True:
+        action = input("What should I do? [A]ccelerate, [B]rake, "
+                 "show [O]dometer, or show average [S]peed?").upper()
+        if action not in "ABOS" or len(action) != 1:
+            print("I don't know how to do that")
+            continue
+        if action == 'A':
+            my_car.accelerate()
+        elif action == 'B':
+            my_car.brake()
+        elif action == 'O':
+            print("The car has driven {} kilometers".format(my_car.odometer))
+        elif action == 'S':
+            print("The car's average speed was {} kph".format(my_car.average_speed()))
+        my_car.step()
+        my_car.say_state()
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