From 8abc94f7cb4001e1a39d7890cb239ad59ee86350 2021-02-01 16:25:00
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2021-02-01 16:25:00
Subject: [PATCH] Backport PR #12255: fix getting signatures in jedi 0.17

---

diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index b5d5a83..77bcd44 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -988,6 +988,15 @@ def _make_signature(completion)-> str:
 
     """
 
+    # it looks like this might work on jedi 0.17
+    if hasattr(completion, 'get_signatures'):
+        signatures = completion.get_signatures()
+        if not signatures:
+            return  '(?)'
+
+        c0 = completion.get_signatures()[0]
+        return '('+c0.to_string().split('(', maxsplit=1)[1]
+
     return '(%s)'% ', '.join([f for f in (_formatparamchildren(p) for signature in completion.get_signatures()
                                           for p in signature.defined_names()) if f])