Fix some Python unification problems

trans/transpiler/phases/emit_cpp/module.py

@@ -76,8 +76,8 @@ class ModuleVisitor(BlockVisitor):
             yield ""
         elif node.module_obj.is_python:
             for alias in node.names:
-                fty = alias.item_obj
-                assert isinstance(fty, FunctionType)
+                fty = alias.item_obj.resolve()
+                #assert isinstance(fty, FunctionType)
 
                 yield from self.emit_python_func(node.module, alias.name, alias.asname or alias.name, fty)
         else:

trans/transpiler/phases/typing/expr.py

@@ -131,14 +131,18 @@ class ScoperExprVisitor(ScoperVisitor):
             init: FunctionType = self.visit_getattr(ftype, "__init__").remove_self()
             init.return_type = ftype.type_object
             return self.visit_function_call(init, arguments)
-        if not isinstance(ftype, FunctionType):
+        if isinstance(ftype, FunctionType):
+            ret = ftype.return_type
+        elif isinstance(ftype, TypeVariable):
+            ret = TypeVariable()
+        else:
             from transpiler.phases.typing.exceptions import NotCallableError
             raise NotCallableError(ftype)
         #is_generic = any(isinstance(arg, TypeVariable) for arg in ftype.to_list())
-        equivalent = FunctionType(arguments, ftype.return_type)
+        equivalent = FunctionType(arguments, ret)
         equivalent.is_intermediary = True
         ftype.unify(equivalent)
-        return ftype.return_type
+        return equivalent.return_type
 
     def visit_Lambda(self, node: ast.Lambda) -> BaseType:
         argtypes = [TypeVariable() for _ in node.args.args]