Suppress non-relevant deprecation warning

pyqtgraph/widgets/VerticalLabel.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore
+import warnings
 
 __all__ = ['VerticalLabel']
 #class VerticalLabel(QtGui.QLabel):
@@ -46,7 +47,8 @@ class VerticalLabel(QtGui.QLabel):
             rgn = self.contentsRect()
         align = self.alignment()
         #align  = QtCore.Qt.AlignTop|QtCore.Qt.AlignHCenter
-            
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore")
             self.hint = p.drawText(rgn, align, self.text())
         p.end()