Move a BaseContext to jedi.common.context.

jedi/common/__init__.py

@@ -1 +1 @@
-from jedi.common.context import BaseContextSet
+from jedi.common.context import BaseContextSet, BaseContext

jedi/common/context.py

@@ -1,3 +1,16 @@
+class BaseContext(object):
+    def __init__(self, evaluator, parent_context=None):
+        self.evaluator = evaluator
+        self.parent_context = parent_context
+
+    def get_root_context(self):
+        context = self
+        while True:
+            if context.parent_context is None:
+                return context
+            context = context.parent_context
+
+
 class BaseContextSet(object):
     def __init__(self, *args):
         self._set = set(args)

jedi/evaluate/context.py

@@ -3,23 +3,19 @@ from parso.python.tree import ExprStmt, CompFor
 from jedi import debug
 from jedi._compatibility import Python3Method, zip_longest, unicode
 from jedi.parser_utils import clean_scope_docstring, get_doc_with_call_signature
-from jedi.common import BaseContextSet
+from jedi.common import BaseContextSet, BaseContext
 
 
-class Context(object):
+class Context(BaseContext):
     """
     Should be defined, otherwise the API returns empty types.
     """
 
+    predefined_names = {}
+    tree_node = None
     """
     To be defined by subclasses.
     """
-    predefined_names = {}
-    tree_node = None
-
-    def __init__(self, evaluator, parent_context=None):
-        self.evaluator = evaluator
-        self.parent_context = parent_context
 
     @property
     def api_type(self):
@@ -27,13 +23,6 @@ class Context(object):
         # overwritten.
         return self.__class__.__name__.lower()
 
-    def get_root_context(self):
-        context = self
-        while True:
-            if context.parent_context is None:
-                return context
-            context = context.parent_context
-
     @debug.increase_indent
     def execute(self, arguments):
         """