rebase: restructure the file

Author: Darshan-KC

.gitignore

@@ -0,0 +1 @@
+venv/

README.md

@@ -1,66 +1,66 @@
-# Python Caesar Cipher
-
-This repository contains a simple implementation of the Caesar Cipher algorithm in Python. The Caesar Cipher is a classic encryption technique where each letter in the plaintext is shifted by a fixed number of positions in the alphabet.
-
-## Features
-
-- Encrypt a plaintext message using a shift key.
-- Decrypt a ciphertext message using a shift key.
-- Handles both uppercase and lowercase letters.
-- Ignores non-alphabetic characters during encryption/decryption.
-
-## How It Works
-
-The Caesar Cipher shifts each letter in the message by a specified number of positions. For example, with a shift of `3`:
-- `A` becomes `D`
-- `B` becomes `E`
-- `Z` wraps around to `C`
-
-## Usage
-
-### Prerequisites
-
-- Python 3.x installed on your system.
-
-### Running the Script
-
-1. Clone the repository:
-    ```bash
-    git clone https://github.com/Darshan-KC/Python-Caesar-cipher.git
-    cd Python-Caesar-cipher
-    ```
-
-2. Run the script:
-    ```bash
-    python caesar_cipher.py
-    ```
-
-3. Follow the on-screen prompts to:
-    - Choose between encryption and decryption.
-    - Input the message and shift key.
-
-### Example
-
-**Input:**
-- Operation: Encrypt
-- Message: `Hello, World!`
-- Shift Key: `3`
-
-**Output:**
-- Encrypted Message: `Khoor, Zruog!`
-
-## File Structure
-
-- `caesar_cipher.py`: The main script implementing the Caesar Cipher.
-
-## Contributing
-
-Contributions are welcome! If you find bugs or want to enhance the functionality, feel free to fork the repository and submit a pull request.
-
-## License
-
-This project is licensed under the [MIT License](LICENSE).
-
----
-
-Happy coding! 😊
+# Python Caesar Cipher
+
+This repository contains a simple implementation of the Caesar Cipher algorithm in Python. The Caesar Cipher is a classic encryption technique where each letter in the plaintext is shifted by a fixed number of positions in the alphabet.
+
+## Features
+
+- Encrypt a plaintext message using a shift key.
+- Decrypt a ciphertext message using a shift key.
+- Handles both uppercase and lowercase letters.
+- Ignores non-alphabetic characters during encryption/decryption.
+
+## How It Works
+
+The Caesar Cipher shifts each letter in the message by a specified number of positions. For example, with a shift of `3`:
+- `A` becomes `D`
+- `B` becomes `E`
+- `Z` wraps around to `C`
+
+## Usage
+
+### Prerequisites
+
+- Python 3.x installed on your system.
+
+### Running the Script
+
+1. Clone the repository:
+    ```bash
+    git clone https://github.com/Darshan-KC/Python-Caesar-cipher.git
+    cd Python-Caesar-cipher
+    ```
+
+2. Run the script:
+    ```bash
+    python caesar_cipher.py
+    ```
+
+3. Follow the on-screen prompts to:
+    - Choose between encryption and decryption.
+    - Input the message and shift key.
+
+### Example
+
+**Input:**
+- Operation: Encrypt
+- Message: `Hello, World!`
+- Shift Key: `3`
+
+**Output:**
+- Encrypted Message: `Khoor, Zruog!`
+
+## File Structure
+
+- `caesar_cipher.py`: The main script implementing the Caesar Cipher.
+
+## Contributing
+
+Contributions are welcome! If you find bugs or want to enhance the functionality, feel free to fork the repository and submit a pull request.
+
+## License
+
+This project is licensed under the [MIT License](LICENSE).
+
+---
+
+Happy coding! 😊

caeser.py

@@ -0,0 +1,27 @@
+class Caeser:
+    def __init__(self, shift) -> None:
+        self.shift = shift
+        
+    def encrypt(self,message) ->str:
+        shift = self.shift % 26
+        result = ''
+        for char in message:
+            if 'A' <= char <= 'Z':
+                result += chr((ord(char) - ord('A') + shift) % 26 + ord('A'))
+            elif 'a' <= char <='z':
+                result += chr((ord(char) - ord('a') + shift) % 26 + ord('a'))
+            else:
+                result += char
+        return result
+    
+    def decrypt(self,message) -> str:
+        shift = self.shift % 26
+        result = ''
+        for char in message:
+            if 'A' <= char <= 'Z':
+                result += chr((ord(char) - ord('A') - shift) % 26 + ord('A'))
+            elif 'a' <= char <= 'z':
+                result += chr((ord(char) - ord('a') - shift) % 26 + ord('a'))
+            else:
+                result += char
+        return result

main.py

@@ -1,49 +1,24 @@
-class Caeser:
-    def __init__(self, shift) -> None:
-        self.shift = shift
-        
-    def encrypt(self,message) ->str:
-        shift = self.shift % 26
-        result = ''
-        for char in message:
-            if 'A' <= char <= 'Z':
-                result += chr((ord(char) - ord('A') + shift) % 26 + ord('A'))
-            elif 'a' <= char <='z':
-                result += chr((ord(char) - ord('a') + shift) % 26 + ord('a'))
-            else:
-                result += char
-        return result
-    
-    def decrypt(self,message) -> str:
-        shift = self.shift % 26
-        result = ''
-        for char in message:
-            if 'A' <= char <= 'Z':
-                result += chr((ord(char) - ord('A') - shift) % 26 + ord('A'))
-            elif 'a' <= char <= 'z':
-                result += chr((ord(char) - ord('a') - shift) % 26 + ord('a'))
-            else:
-                result += char
-        return result
-
-def main():
-    # try:
-        caeser = Caeser(9) # you can use shift value from user also
-        choice = int(input("Choose mode: \n1. Encrypt \n2. Decrypt\n: "))
-        if choice == 1:
-            message = input("Enter the message to encrypt: ")
-            result = caeser.encrypt(message)
-            print(f"Encryption of '{message}' is '{result}'")
-            
-        elif choice == 2:
-            message = input("Enter the encypted message to decrypt: ")
-            result = caeser.decrypt(message)
-            print(f"Decryption of '{message}' is '{result}'")
-        else:
-            print("Invalid choice")
-        
-    # except:
-    #     print("Exception occurs")
-
-if __name__ == "__main__":
+# main.py
+from caeser import Caeser
+
+def main():
+    # try:
+        caeser = Caeser(9) # you can use shift value from user also
+        choice = int(input("Choose mode: \n1. Encrypt \n2. Decrypt\n: "))
+        if choice == 1:
+            message = input("Enter the message to encrypt: ")
+            result = caeser.encrypt(message)
+            print(f"Encryption of '{message}' is '{result}'")
+            
+        elif choice == 2:
+            message = input("Enter the encypted message to decrypt: ")
+            result = caeser.decrypt(message)
+            print(f"Decryption of '{message}' is '{result}'")
+        else:
+            print("Invalid choice")
+        
+    # except:
+    #     print("Exception occurs")
+
+if __name__ == "__main__":
     main()