instance_allow_descriptor_getattr as public setting

jedi/api/__init__.py

@@ -708,7 +708,6 @@ class Interpreter(Script):
     :param namespaces: A list of namespace dictionaries such as the one
         returned by :func:`globals` and :func:`locals`.
     """
-    _allow_descriptor_getattr_default = True
 
     def __init__(self, code, namespaces, *, project=None, **kwds):
         try:
@@ -729,7 +728,7 @@ class Interpreter(Script):
         super().__init__(code, environment=environment, project=project, **kwds)
 
         self.namespaces = namespaces
-        self._inference_state.allow_descriptor_getattr = self._allow_descriptor_getattr_default
+        self._inference_state.allow_descriptor_getattr = settings.instance_allow_descriptor_getattr
 
     @cache.memoize_method
     def _get_module_context(self):

jedi/settings.py

@@ -143,6 +143,12 @@ This improves autocompletion for libraries that use ``setattr`` or
 ``globals()`` modifications a lot.
 """
 
+instance_allow_descriptor_getattr = True
+"""
+Controls whether descriptors are evaluated when using an Interpreter. This is
+something you might want to control when using Jedi from a Repl (e.g. IPython)
+"""
+
 # ----------------
 # Caching Validity
 # ----------------

test/test_api/test_interpreter.py

@@ -8,6 +8,7 @@ import typing
 import pytest
 
 import jedi
+import jedi.settings
 from jedi.inference.compiled import mixed
 from importlib import import_module
 
@@ -219,7 +220,7 @@ def test__getattr__completions(allow_unsafe_getattr, class_is_findable):
 
 @pytest.fixture(params=[False, True])
 def allow_unsafe_getattr(request, monkeypatch):
-    monkeypatch.setattr(jedi.Interpreter, '_allow_descriptor_getattr_default', request.param)
+    monkeypatch.setattr(jedi.settings,'instance_allow_descriptor_getattr', request.param)
     return request.param