sip: switch to new PyQt5 api import, with fallback to the old implementation if not found.

Also calls to setapi are not needed anymore, so use them only with the old implementation.

See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966045
for reference

pyqtgraph/GraphicsScene/GraphicsScene.py

@@ -16,6 +16,9 @@ getMillis = lambda: int(round(time.time() * 1000))
 
 if hasattr(QtCore, 'PYQT_VERSION'):
     try:
+        try:
+            from PyQt5 import sip
+        except ImportError:
             import sip
         HAVE_SIP = True
     except ImportError:

pyqtgraph/Qt.py

@@ -320,6 +320,9 @@ if QT_LIB in [PYSIDE, PYSIDE2]:
 if QT_LIB in [PYQT4, PYQT5]:
     QtVersion = QtCore.QT_VERSION_STR
     
+    try:
+        from PyQt5 import sip
+    except ImportError:
         import sip
     def isQObjectAlive(obj):
         return not sip.isdeleted(obj)

pyqtgraph/debug.py

@@ -1083,6 +1083,9 @@ def listQThreads():
     """Prints Thread IDs (Qt's, not OS's) for all QThreads."""
     thr = findObj('[Tt]hread')
     thr = [t for t in thr if isinstance(t, QtCore.QThread)]
+    try:
+        from PyQt5 import sip
+    except ImportError:
         import sip
     for t in thr:
         print("--> ", t)

pyqtgraph/dockarea/tests/test_dock.py

@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
-#import sip
-#sip.setapi('QString', 1)
+#try:
+#    from PyQt5 import sip
+#except ImportError:
+#    import sip
+#    sip.setapi('QString', 1)
 
 import pyqtgraph as pg
 pg.mkQApp()

pyqtgraph/graphicsItems/GraphicsObject.py

@@ -1,5 +1,8 @@
 from ..Qt import QtGui, QtCore, QT_LIB
 if QT_LIB in ['PyQt4', 'PyQt5']:
+    try:
+        from PyQt5 import sip
+    except ImportError:
         import sip
 from .GraphicsItem import GraphicsItem
 

pyqtgraph/graphicsItems/UIGraphicsItem.py

@@ -2,6 +2,9 @@ from ..Qt import QtGui, QtCore, QT_LIB
 import weakref
 from .GraphicsObject import GraphicsObject
 if QT_LIB in ['PyQt4', 'PyQt5']:
+    try:
+        from PyQt5 import sip
+    except ImportError:
         import sip
 
 __all__ = ['UIGraphicsItem']

pyqtgraph/multiprocess/bootstrap.py

@@ -25,6 +25,9 @@ if __name__ == '__main__':
 
     pyqtapis = opts.pop('pyqtapis', None)
     if pyqtapis is not None:
+        try:
+            from PyQt5 import sip
+        except ImportError:
             import sip
             for k,v in pyqtapis.items():
                 sip.setapi(k, v)

pyqtgraph/widgets/RemoteGraphicsView.py

@@ -1,5 +1,8 @@
 from ..Qt import QtGui, QtCore, QT_LIB
 if QT_LIB in ['PyQt4', 'PyQt5']:
+    try:
+        from PyQt5 import sip
+    except ImportError:
         import sip
 from .. import multiprocess as mp
 from .GraphicsView import GraphicsView