cc_encrypt.py

import string
from time import sleep

alphabet = string.ascii_lowercase # "abcdefghijklmnopqrstuvwxyz"

def encryptWithParams(message, key):
    encrypted_message = ""

    for c in message:

        if c in alphabet:
            position = alphabet.find(c)
            new_position = (position + key) % 26
            new_character = alphabet[new_position]
            encrypted_message += new_character
        else:
            encrypted_message += c
    return encrypted_message

def encrypt():
    
    print("Welcome to Caesar Cipher Encryption.\n")
    message1 = input("Type a message you would like to encrypt: ").lower()
    print()
    key1 = int(input("Enter your cypher step: "))

    encrypted_message = encryptWithParams(message1,key1)

    print("\nEncrypting your message...\n")
    sleep(2) # give an appearance of doing something complicated
    print("Stand by, almost finished...\n")
    sleep(2) # more of the same
    print("Your encrypted message is:\n")
    print(encrypted_message)

encrypt()