Added basic implementation for Python code evaluation

parsers/DefaultParser.py

@@ -31,15 +31,29 @@ class UnexpectedTokenErrorNode(DefaultParserErrorNode):
     expected_tokens: list
 
     def __post_init__(self):
-        log.debug("UnexpectedToken : " + self.message)
+        log.debug("-> UnexpectedTokenErrorNode: " + self.message)
 
 
 @dataclass()
 class SyntaxErrorNode(DefaultParserErrorNode):
+    """
+    The input is recognized, but there is a syntax error
+    """
     message: str
 
     def __post_init__(self):
-        log.debug("SyntaxError : " + self.message)
+        log.debug("-> SyntaxErrorNode: " + self.message)
+
+
+@dataclass()
+class CannotHandleErrorNode(DefaultParserErrorNode):
+    """
+    The input is not recognized
+    """
+    text: str
+
+    def __post_init__(self):
+        log.debug("-> CannotHandleErrorNode: " + self.text)
 
 
 @dataclass()
@@ -134,7 +148,7 @@ class BinaryNode(DefaultParserNode):
 
 class DefaultParser(BaseParser):
     def __init__(self, text, sub_parser):
-        BaseParser.__init__(self, "Default", text)
+        BaseParser.__init__(self, "DefaultParser", text)
         self.sub_parser = sub_parser
         self.lexer = Tokenizer(text)
         self.lexer_iter = iter(Tokenizer(text))
@@ -237,7 +251,7 @@ class DefaultParser(BaseParser):
             self.next_token()
             return self.parse_def_concept()
         else:
-            return self.parse_expression()
+            return self.add_error(CannotHandleErrorNode([], self.text))
 
     def parse_def_concept(self):
         """