typecheck: Python 3.7 compatibility, yay!

Technologicat · Technologicat · commit 53c6951045e5 · 2020-08-21T01:00:36.000+03:00
diff --git a/unpythonic/typecheck.py b/unpythonic/typecheck.py
@@ -222,7 +222,7 @@ def get_args(tp):
         if not isinstance(value, tuple):
             return False
         # bare `typing.Tuple`, no restrictions on length or element type.
-        if T.__args__ is None:
+        if not T.__args__:
             return True
         # homogeneous element type, arbitrary length
         if len(T.__args__) == 2 and T.__args__[1] is Ellipsis:
