From 80c90ada438e2b9e1d992e102500a950a073cad4 Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Tue, 21 Jan 2020 17:16:19 +0900
Subject: [PATCH] fix sip loading when not provided from Qt

---
 src/calibre/ebooks/oeb/polish/check/css.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/oeb/polish/check/css.py b/src/calibre/ebooks/oeb/polish/check/css.py
index f48ad11838..d96c84c4ad 100644
--- a/src/calibre/ebooks/oeb/polish/check/css.py
+++ b/src/calibre/ebooks/oeb/polish/check/css.py
@@ -10,7 +10,10 @@ import numbers
 import sys
 from collections import namedtuple
 
-from PyQt5 import sip
+try:
+    from PyQt5 import sip
+except ImportError:
+    import sip
 from PyQt5.Qt import QApplication, QEventLoop, pyqtSignal
 from PyQt5.QtWebEngineWidgets import (
     QWebEnginePage, QWebEngineProfile, QWebEngineScript