Oops

Technologicat · Technologicat · commit c3a50092ed6c · 2020-08-23T04:20:13.000+03:00
diff --git a/unpythonic/typecheck.py b/unpythonic/typecheck.py
@@ -303,8 +303,9 @@ def iscollection(statictype, runtimetype):
                 typeargs = (int,)
             else:
                 typeargs = T.__args__
+            # Python 3.6: consistent behavior with 3.7+, which use an unconstrained TypeVar T.
             if typeargs is None:
-                raise TypeError("Missing mandatory element type argument of `{}`".format(statictype))
+                typeargs = (typing.TypeVar("T"))
             # Judging by the docs, List takes one type argument. The rest are similar.
             # https://docs.python.org/3/library/typing.html#typing.List
             assert len(typeargs) == 1
