From acc5655546dd6b439d8d38697e4bbad19b37137e 2018-09-07 10:53:52
From: Christoph <cbj@mail.uni-paderborn.de>
Date: 2018-09-07 10:53:52
Subject: [PATCH] check also WAYLAND_DISPLAY

---

diff --git a/IPython/terminal/pt_inputhooks/qt.py b/IPython/terminal/pt_inputhooks/qt.py
index 58a5377..d2e23ab 100644
--- a/IPython/terminal/pt_inputhooks/qt.py
+++ b/IPython/terminal/pt_inputhooks/qt.py
@@ -13,8 +13,8 @@ def inputhook(context):
     if not app:
         if sys.platform == 'linux':
             try:
-                os.environ['DISPLAY']  # DISPLAY is set
-                assert os.environ['DISPLAY'] != ''  # DISPLAY is not empty
+                # DISPLAY or WAYLAND_DISPLAY is set and not empty
+                assert os.environ.get('DISPLAY') or os.environ.get('WAYLAND_DISPLAY')
             except Exception:
                 import warnings
                 global _already_warned