Fix annotations for older versions of Python

Author: kesmit13

singlestoredb/functions/signature.py

@@ -1089,7 +1089,7 @@ def get_signature(
     Dict[str, Any]
 
     '''
-    signature = inspect.signature(func, eval_str=True)
+    signature = inspect.signature(func)
     args: List[Dict[str, Any]] = []
     returns: List[Dict[str, Any]] = []
 
@@ -1106,6 +1106,8 @@ def get_signature(
         elif p.kind == inspect.Parameter.VAR_KEYWORD:
             raise TypeError('variable keyword arguments are not supported')
 
+    # TODO: Use typing.get_type_hints() for parameters / return values?
+
     # Generate the parameter type and the corresponding SQL code for that parameter
     args_schema = []
     args_data_formats = []

singlestoredb/functions/typing.py

@@ -4,8 +4,8 @@
 from typing import TypeVar
 
 try:
-    from typing import TypeVarTuple
-    from typing import Unpack
+    from typing import TypeVarTuple  # type: ignore
+    from typing import Unpack  # type: ignore
 except ImportError:
     # Python 3.8 and earlier do not have TypeVarTuple
     from typing_extensions import TypeVarTuple  # type: ignore
@@ -37,5 +37,5 @@ def __new__(cls, *args: T) -> 'Masked[T]':
 class Table(Tuple[Unpack[Ts]]):
     """Return type for a table valued function."""
 
-    def __new__(cls, *args: Unpack[Ts]) -> 'Table[Unpack[Ts]]':
+    def __new__(cls, *args: Unpack[Ts]) -> 'Table[Tuple[Unpack[Ts]]]':
         return tuple.__new__(cls, args)  # type: ignore

singlestoredb/tests/test_udf_returns.py

@@ -1,5 +1,4 @@
-from __future__ import annotations
-
+# from __future__ import annotations
 import unittest
 from typing import Any
 from typing import Callable