From c01dedeaa3c6b077cd96f6718362e39f69c4ccbd 2023-04-05 16:58:35
From: Erik Welch <erik.n.welch@gmail.com>
Date: 2023-04-05 16:58:35
Subject: [PATCH] Don't do truthy check on object; use `is not None`

For example, without this change, doing `df.merge?` on a pandas DataFrame
currently fails, because `df.__bool__()` raises an exception.

---

diff --git a/IPython/core/oinspect.py b/IPython/core/oinspect.py
index 83aada8..0b8b2b8 100644
--- a/IPython/core/oinspect.py
+++ b/IPython/core/oinspect.py
@@ -835,7 +835,7 @@ class Inspector(Colorable):
         att_name = oname.split(".")[-1]
         parents_docs = None
         prelude = ""
-        if info and info.parent and hasattr(info.parent, HOOK_NAME):
+        if info and info.parent is not None and hasattr(info.parent, HOOK_NAME):
             parents_docs_dict = getattr(info.parent, HOOK_NAME)
             parents_docs = parents_docs_dict.get(att_name, None)
         out = dict(