https://sources.debian.org/data/main/p/pyqt5/5.11.3+dfsg-1/debian/patches/public_sip.diff

From: Dmitry Shachnev <mitya57@debian.org>
Date: Tue, 3 Jul 2018 09:46:42 +0300
Subject: Use the public version of sip module

Per https://www.debian.org/doc/debian-policy/#convenience-copies-of-code.
---
 configure.py              | 2 +-
 designer/pluginloader.cpp | 2 +-
 qmlscene/pluginloader.cpp | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/configure.py b/configure.py
index 32d03a0..3c43a14 100644
--- a/configure.py
+++ b/configure.py
@@ -2440,7 +2440,7 @@ def get_sip_flags(target_config):
     the target configuration.
     """
 
-    sip_flags = ['-n', 'PyQt5.sip']
+    sip_flags = ['-n', 'sip']
 
     # If we don't check for signed interpreters, we exclude the 'VendorID'
     # feature
diff --git a/designer/pluginloader.cpp b/designer/pluginloader.cpp
index f41d391..3ca8b11 100644
--- a/designer/pluginloader.cpp
+++ b/designer/pluginloader.cpp
@@ -167,7 +167,7 @@ bool PyCustomWidgets::importPlugins(const QString &dir, const QStringList &plugi
     // Make sure we have sip.unwrapinstance.
     if (!sip_unwrapinstance)
     {
-        sip_unwrapinstance = getModuleAttr("PyQt5.sip", "unwrapinstance");
+        sip_unwrapinstance = getModuleAttr("sip", "unwrapinstance");
 
         if (!sip_unwrapinstance)
             return true;
diff --git a/qmlscene/pluginloader.cpp b/qmlscene/pluginloader.cpp
index e14b946..140e80c 100644
--- a/qmlscene/pluginloader.cpp
+++ b/qmlscene/pluginloader.cpp
@@ -412,9 +412,9 @@ PyObject *PyQt5QmlPlugin::getModuleAttr(const char *module, const char *attr)
 void PyQt5QmlPlugin::getSipAPI()
 {
 #if defined(SIP_USE_PYCAPSULE)
-    sip = (const sipAPIDef *)PyCapsule_Import("PyQt5.sip._C_API", 0);
+    sip = (const sipAPIDef *)PyCapsule_Import("sip._C_API", 0);
 #else
-    PyObject *c_api = getModuleAttr("PyQt5.sip", "_C_API");
+    PyObject *c_api = getModuleAttr("sip", "_C_API");
 
     if (c_api)
     {