add warning about fallback

Author: danplischke

src/sqlacodegen/generators.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import inspect
+import logging
 import re
 import sys
 from abc import ABCMeta, abstractmethod
@@ -65,6 +66,8 @@
     uses_default_name,
 )
 
+_logger = logging.getLogger(__name__)
+
 _re_boolean_check_constraint = re.compile(r"(?:.*?\.)?(.*?) IN \(0, 1\)")
 _re_column_name = re.compile(r'(?:(["`]?).*\1\.)?(["`]?)(.*)\2')
 _re_enum_check_constraint = re.compile(r"(?:.*?\.)?(.*?) IN \((.+)\)")
@@ -1246,6 +1249,9 @@ def render_python_type(column_type: TypeEngine[Any]) -> str:
                 try:
                     python_type = column_type.python_type
                 except NotImplementedError:
+                    _logger.warning(
+                        f"Unable to determine python type for {column_type}, falling back to typing.Any"
+                    )
                     self.add_literal_import("typing", "Any")
                     python_type = Any