Explicitly require GTK 3.0 in GTK3 examples.

QuLogic · QuLogic · commit c0324d871d8e · 2018-03-03T21:11:56.000-05:00
This silences a warning from PyGI.
diff --git a/examples/user_interfaces/embedding_in_gtk3_panzoom_sgskip.py b/examples/user_interfaces/embedding_in_gtk3_panzoom_sgskip.py
@@ -6,6 +6,8 @@
 Demonstrate NavigationToolbar with GTK3 accessed via pygobject.
 """
 
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
 
 from matplotlib.backends.backend_gtk3 import (
diff --git a/examples/user_interfaces/embedding_in_gtk3_sgskip.py b/examples/user_interfaces/embedding_in_gtk3_sgskip.py
@@ -7,6 +7,8 @@
 GTK3 accessed via pygobject.
 """
 
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
 
 from matplotlib.backends.backend_gtk3agg import (
diff --git a/examples/user_interfaces/mpl_with_glade3_sgskip.py b/examples/user_interfaces/mpl_with_glade3_sgskip.py
@@ -7,6 +7,8 @@
 
 import os
 
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
 
 from matplotlib.figure import Figure
