Merge pull request #11089 from ipython/auto-backport-of-pr-11087

Backport PR  #11087 on branch 5.x

IPython/core/pylabtools.py

@@ -48,6 +48,9 b" backend2gui['CocoaAgg'] = 'osx'"
 # And some backends that don't need GUI integration
 del backend2gui['nbAgg']
 del backend2gui['agg']
+del backend2gui['svg']
+del backend2gui['pdf']
+del backend2gui['ps']
 del backend2gui['module://ipykernel.pylab.backend_inline']
 
 #-----------------------------------------------------------------------------

IPython/core/tests/test_pylabtools.py

@@ -245,3 +245,7 b' class TestPylabSwitch(object):'
         nt.assert_equal(gui, 'qt')
         nt.assert_equal(s.pylab_gui_select, 'qt')
 
+
+def test_no_gui_backends():
+    for k in ['agg', 'svg', 'pdf', 'ps']:
+        assert k not in pt.backend2gui