conctact_books.py

from notifypy import Notify

notification = Notify()


usernames = []

while True:
	prompt = input("> ")

	if prompt.startswith("add"):
		command = prompt[4:]
		usernames.append(command)
		print(usernames)
	elif prompt.startswith("remove"):
		command = prompt[7:]
		if command in usernames:
			usernames.remove(command)
			print(usernames)
		else:
			print("This username does not exist in the list.")

	elif prompt.startswith("replace"):
		command = prompt[8:]
		if command not in usernames:
			print("This user does not exist in the list. ")
			continue
		else:
			pass
		new_val = input("with: ")
		usernames.remove(command)
		usernames.append(new_val)
		print(usernames)
		print("")
		notification.title = 'Replaced Complete'
		notification.message = "Successfully replaced " + str(command) + " with " + str(new_val)
		notification.send()

	elif prompt == "list":
		print(usernames)

	elif prompt.startswith("exit"):
		break
	else:
		pass