Fixed addition and subraction bug in the calc_engine.

token.py

@@ -52,13 +52,13 @@ class TokenType:
 
 	@staticmethod
 	def get_operator(character):
-		"""
-        Accepts an individual character and returns either the math operator TokenType or unknown.
-        """
+		#
+        #Accepts an individual character and returns either the math operator TokenType or unknown.
+        #
 		if not character in TokenType.OPERATORS:
 			return TokenType.unknown
 		return TokenType.OPERATORS[character]
 	
 	@staticmethod
-	def get_operator_name(tokenType):
+	def get_token_type_name(tokenType):
 		return TokenType.TOKEN_NAMES[tokenType]