Use one single way to convert stubs to Python, see #1466

jedi/inference/gradual/conversion.py

@@ -99,31 +99,21 @@ def _python_to_stub_names(names, fallback_to_python=False):
             yield name
             continue
 
-        if name.is_import():
+        if name.api_type == 'module':
-            for new_name in name.goto():
+            values = convert_values(name.infer(), only_stubs=True)
-                # Imports don't need to be converted, because they are already
+            if values:
-                # stubs if possible.
+                for v in values:
-                if fallback_to_python or new_name.is_stub():
+                    yield v.name
-                    yield new_name
                 continue
-
+        else:
-        name_list = name.get_qualified_names()
+            v = name.get_defining_qualified_value()
-        stubs = NO_VALUES
+            if v is not None:
-        if name_list is not None:
+                converted = to_stub(v)
-            stub_module = _load_stub_module(module_context.get_value())
+                if converted:
-            if stub_module is not None:
+                    converted_names = converted.goto(name.get_public_name())
-                stubs = ValueSet({stub_module})
+                    if converted_names:
-                for name in name_list[:-1]:
+                        for n in converted_names:
-                    stubs = stubs.py__getattribute__(name)
+                            yield n
-        if stubs and name_list:
-            new_names = stubs.goto(name_list[-1])
-            for new_name in new_names:
-                yield new_name
-            if new_names:
-                continue
-        elif stubs:
-            for c in stubs:
-                yield c.name
                         continue
         if fallback_to_python:
             # This is the part where if we haven't found anything, just return
@@ -158,7 +148,6 @@ def convert_values(values, only_stubs=False, prefer_stubs=False, ignore_compiled
             )
 
 
-# TODO merge with _python_to_stub_names?
 def to_stub(value):
     if value.is_stub():
         return ValueSet([value])