submodules are automatically indexed without actually importing them. fixes #413.

However, this is not a 100% correct Python behavior. Python behavior would be to follow ALL imports in all modules (recursively) and check if the module was imported. However, that's a lot of work, that would slow down autocompletion. For now it's better to have no false positives in flaking and to ignore a few attribute errors.

jedi/evaluate/finder.py

@@ -73,8 +73,8 @@ class NameFinder(object):
                 gen = self.scope.scope_names_generator
             except AttributeError:
                 if isinstance(self.scope, er.Class):
-                    # classes are only available directly via chaining?
-                    # strange stuff...
+                    # Classes don't have a positional limitation of their
+                    # state. It's the whole class.
                     names = self.scope.get_defined_names()
                 else:
                     names = _get_defined_names_for_position(self.scope, self.position)
@@ -118,7 +118,7 @@ class NameFinder(object):
 
         self._last_filter_name_scope = name_list_scope
         scope_txt = (self.scope if self.scope == name_list_scope
-                     else ('%s-%s' % self.scope, name_list_scope))
+                     else '%s-%s' % (self.scope, name_list_scope))
         debug.dbg('finder.filter_name "%s" in (%s): %s@%s', self.name_str,
                   scope_txt, u(result), self.position)
         return result

jedi/evaluate/helpers.py

@@ -186,6 +186,13 @@ class FakeStatement(pr.Statement):
         self.set_expression_list(expression_list)
 
 
+class FakeImport(pr.Import):
+    def __init__(self, name, parent):
+        p = 0, 0
+        super(FakeImport, self).__init__(FakeSubModule, p, p, name)
+        self.parent = parent
+
+
 class FakeName(pr.Name):
     def __init__(self, name_or_names, parent=None):
         p = 0, 0

jedi/evaluate/representation.py

@@ -11,6 +11,8 @@ So, why is there also a ``Class`` class here? Well, there are decorators and
 they change classes in Python 3.
 """
 import copy
+import os
+import pkgutil
 
 from jedi._compatibility import use_metaclass, unicode
 from jedi.parser import representation as pr
@@ -539,6 +541,10 @@ class ModuleWrapper(pr.Module):
         self._evaluator = evaluator
         self._module = module
 
+    def scope_names_generator(self):
+        yield self, self.get_defined_names()
+        yield self, self._sub_modules()
+
     @memoize_default()
     def get_defined_names(self):
         names = ['__file__', '__package__', '__doc__', '__name__', '__version__']
@@ -547,6 +553,19 @@ class ModuleWrapper(pr.Module):
         module_attributes = [helpers.FakeName(n, parent) for n in names]
         return self._module.get_defined_names() + module_attributes
 
+    @memoize_default()
+    def _sub_modules(self):
+        path = self._module.path
+        names = []
+        if path.endswith(os.path.sep + '__init__.py'):
+            mods = pkgutil.iter_modules([os.path.dirname(path)])
+            for module_loader, name, is_pkg in mods:
+                name = helpers.FakeName(name)
+                imp = helpers.FakeImport(name, self)
+                name.parent = imp
+                names.append(name)
+        return names
+
     def __getattr__(self, name):
         return getattr(self._module, name)
 

test/completion/usages.py

@@ -80,7 +80,7 @@ import module_not_exists
 module_not_exists
 
 
-#< ('rename1', 1,0), (0,24), (3,0), (6,17), ('rename2', 4,5), (10,17), (13,17)
+#< ('rename1', 1,0), (0,24), (3,0), (6,17), ('rename2', 4,5), (10,17), (13,17), ('imports', 68, 16)
 from import_tree import rename1
 
 #< (0,8), ('rename1',3,0), ('rename2',4,20), ('rename2',6,0), (3,32), (7,32), (4,0)
@@ -90,7 +90,7 @@ rename1.abc
 from import_tree.rename1 import abc
 abc
 
-#< 20 ('rename1', 1,0), ('rename2', 4,5), (-10,24), (-7,0), (-4,17), (0,17), (3,17)
+#< 20 ('rename1', 1,0), ('rename2', 4,5), (-10,24), (-7,0), (-4,17), (0,17), (3,17), ('imports', 68, 16)
 from import_tree.rename1 import abc
 
 #< (0, 32),