updted

Author: PavanMudigonda

44-encryption-program/main.py

@@ -17,12 +17,12 @@
 print(f"key:   {key}")
 
 # ENCRYPTION
-plain_text = input("Enter a message to encrypt")
+plain_text = input("Enter a message to encrypt: ")
 cipher_text = ""
 
 for letter in plain_text:
-    index = chars.index(letter)
-    cipher_text += key[index]
+    index_of_letter = chars.index(letter)
+    cipher_text += key[index_of_letter]
 
 print(f'original message: {plain_text}')
 print(f'encryption message: {cipher_text}')

46-python-oop/car-blueprint.png

@@ -0,0 +1,51 @@
+# Python Object Oriented Programming
+# object = A "bundle" of related attributes and methods(functions)
+#          Ex. phone, cup, book, car, dog
+#           You need a "class" to create many objects of the same type
+
+# class = (blueprint) used to design the structure and layout of an object
+
+# method = A function that is defined inside a class
+
+# DUNDER means double underscore __init__ = constructor method
+
+# create a class
+class Car:
+    # attributes
+    def __init__(self, make, model, year, color):  # constructor method
+        self.make = make
+        self.model = model
+        self.year = year
+        self.color = color
+        self.mileage = 0
+        self.for_sale = False
+
+    # define methods
+    def drive(self):
+        print(f"The {self.make} is driving.")
+
+    def stop(self):
+        print(f"The {self.make} has stopped.")
+    
+    def left_turn(self):
+        print(f"The {self.make} is turning left.")
+    def right_turn(self):
+        print(f"The {self.make} is turning right.")
+    def park(self):
+        print(f"The {self.make} is parked.")
+
+# # create objects (instances) of the Car class
+# camry_car = Car("Toyota", "Camry", 2020, "Blue")
+# civic_car = Car("Honda", "Civic", 2019, "Red")
+
+# # access attributes
+# print(camry_car.make)   # Output: Toyota
+# print(civic_car.model)  # Output: Civic
+# print(camry_car.year)  # Output: 2020
+# # call methods
+# camry_car.drive(camry_car.make)
+# civic_car.park(civic_car.make)
+# camry_car.left_turn(camry_car.make)
+# civic_car.right_turn(civic_car.make)
+# camry_car.stop(camry_car.make)
+# civic_car.drive(civic_car.make)

46-python-oop/cars.py

@@ -0,0 +1,20 @@
+# first import the Car class from cars module
+
+from cars import Car
+
+
+# create objects (instances) of the Car class
+camry_car = Car("Toyota", "Camry", 2020, "Blue")
+civic_car = Car("Honda", "Civic", 2019, "Red")
+
+# # access attributes
+print(camry_car.make)   # Output: Toyota
+print(civic_car.model)  # Output: Civic
+print(camry_car.year)  # Output: 2020
+# # call methods
+camry_car.drive()
+civic_car.park()
+camry_car.left_turn()
+civic_car.right_turn()
+camry_car.stop()
+civic_car.drive()