Add classes for Python function arguments

src/jcloud_docsgen/exceptions.py

@@ -28,4 +28,36 @@ class NamespaceError(ValueError):
         
 class InvalidNamespaceError(NamespaceError): ...
 class NamespaceNotFoundError(NamespaceError): ...
-class NamespaceExistsError(NamespaceError): ...
+class NamespaceExistsError(NamespaceError): ...
+
+class PythonIdentifierError(ValueError):
+    '''
+    Base class for Python identifier errors.
+    '''
+    def __init__(self, *args: object, identifier: str = '') -> None:
+        super().__init__(*args)
+        self.identifier = identifier
+
+    def __str__(self):
+        if not self.args:
+            return ''
+        else:
+            return f'{self.args[0]}{": " if self.identifier and self.args[0] else ""}{self.identifier if self.args[0] else ""}'
+
+class InvalidPythonIdentifierError(PythonIdentifierError): ...
+
+class PythonAnnotationError(ValueError):
+    '''
+    Base class for Python annotation errors.
+    '''
+    def __init__(self, *args: object, annotation: str = '') -> None:
+        super().__init__(*args)
+        self.annotation = annotation
+
+    def __str__(self):
+        if not self.args:
+            return ''
+        else:
+            return f'{self.args[0]}{": " if self.annotation and self.args[0] else ""}{self.annotation if self.args[0] else ""}'
+
+class InvalidPythonAnnotationError(PythonAnnotationError): ...