Some more code quality fixes

jedi/__main__.py

@@ -27,8 +27,8 @@ def _start_linter():
             paths = [path]
 
         try:
-            for path in paths:
-                for error in jedi.Script(path=path)._analysis():
+            for p in paths:
+                for error in jedi.Script(path=p)._analysis():
                     print(error)
         except Exception:
             if '--pdb' in sys.argv:

jedi/_compatibility.py

@@ -186,7 +186,6 @@ def find_module_pre_py3(string, path=None, full_name=None, is_global_search=True
             module_file = None
 
         if module_file is None:
-            code = None
             return None, is_package
 
         with module_file:

jedi/inference/__init__.py

@@ -63,7 +63,6 @@ only *inferes* what needs to be *inferred*. All the statements and modules
 that are not used are just being ignored.
 """
 import parso
-from parso import python_bytes_to_unicode
 from jedi.file_io import FileIO
 
 from jedi import debug
@@ -186,7 +185,7 @@ class InferenceState(object):
                 file_io = FileIO(path)
             code = file_io.read()
         # We cannot just use parso, because it doesn't use errors='replace'.
-        code = python_bytes_to_unicode(code, encoding=encoding, errors='replace')
+        code = parso.python_bytes_to_unicode(code, encoding=encoding, errors='replace')
 
         if len(code) > settings._cropped_file_size:
             code = code[:settings._cropped_file_size]

jedi/inference/arguments.py

@@ -161,7 +161,9 @@ def unpack_arglist(arglist):
         if child == ',':
             continue
         elif child in ('*', '**'):
-            yield len(child.value), next(iterator)
+            c = next(iterator, None)
+            assert c is not None
+            yield len(child.value), c
         elif child.type == 'argument' and \
                 child.children[0] in ('*', '**'):
             assert len(child.children) == 2

jedi/inference/base_value.py

@@ -70,8 +70,6 @@ class HelperValueMixin(object):
                     yield f
 
     def goto(self, name_or_str, name_context=None, analysis_errors=True):
-        if name_context is None:
-            name_context = self
         from jedi.inference import finder
         filters = self._get_value_filters(name_or_str)
         names = finder.filter_name(filters, name_or_str)
@@ -218,7 +216,6 @@ class Value(HelperValueMixin, BaseValue):
             return ''
         else:
             return clean_scope_docstring(self.tree_node)
-        return None
 
     def get_safe_value(self, default=sentinel):
         if default is sentinel:

jedi/inference/compiled/value.py

@@ -589,9 +589,6 @@ def _parse_function_doc(doc):
 
 def create_from_name(inference_state, compiled_value, name):
     access_paths = compiled_value.access_handle.getattr_paths(name, default=None)
-    parent_context = compiled_value
-    if parent_context.is_class():
-        parent_context = parent_context.parent_context
 
     value = None
     for access_path in access_paths:

jedi/inference/gradual/annotation.py

@@ -220,8 +220,6 @@ def infer_return_types(function, arguments):
             function.get_default_param_context(),
             match.group(1).strip()
         ).execute_annotation()
-        if annotation is None:
-            return NO_VALUES
 
     context = function.get_default_param_context()
     unknown_type_vars = find_unknown_type_vars(context, annotation)

jedi/inference/gradual/stub_value.py

@@ -41,7 +41,7 @@ class StubModuleValue(ModuleValue):
 
     def get_filters(self, origin_scope=None):
         filters = super(StubModuleValue, self).get_filters(origin_scope)
-        next(filters)  # Ignore the first filter and replace it with our own
+        next(filters, None)  # Ignore the first filter and replace it with our own
         stub_filters = self._get_stub_filters(origin_scope=origin_scope)
         for f in stub_filters:
             yield f
@@ -76,7 +76,7 @@ class TypingModuleWrapper(StubModuleValue):
 class TypingModuleContext(ModuleContext):
     def get_filters(self, *args, **kwargs):
         filters = super(TypingModuleContext, self).get_filters(*args, **kwargs)
-        yield TypingModuleFilterWrapper(next(filters))
+        yield TypingModuleFilterWrapper(next(filters, None))
         for f in filters:
             yield f
 

jedi/inference/gradual/typeshed.py

@@ -103,9 +103,6 @@ def import_module_decorator(func):
                 # ``os.path``, because it's a very important one in Python
                 # that is being achieved by messing with ``sys.modules`` in
                 # ``os``.
-                python_parent = next(iter(parent_module_values))
-                if python_parent is None:
-                    python_parent, = inference_state.import_module(('os',), prefer_stubs=False)
                 python_value_set = ValueSet.from_sets(
                     func(inference_state, (n,), None, sys_path,)
                     for n in [u'posixpath', u'ntpath', u'macpath', u'os2emxpath']

jedi/inference/references.py

@@ -38,8 +38,8 @@ def _resolve_names(definition_names, avoid_names=()):
             yield name
 
         if name.api_type == 'module':
-            for name in _resolve_names(name.goto(), definition_names):
-                yield name
+            for n in _resolve_names(name.goto(), definition_names):
+                yield n
 
 
 def _dictionarize(names):

jedi/parser_utils.py

@@ -267,7 +267,6 @@ def get_parent_scope(node, include_flows=False):
                         continue
             return scope
         scope = scope.parent
-    return scope
 
 
 get_cached_parent_scope = _get_parent_scope_cache(get_parent_scope)