fix get_mpl_interactive_backend

spyder_kernels/console/kernel.py

@@ -505,39 +505,21 @@ def get_mpl_interactive_backend(self):
         }
 
         try:
-            # --- Get interactive framework
-            framework = None
-
-            # This is necessary because _get_running_interactive_framework
-            # can't detect Tk in a Jupyter kernel.
-            if hasattr(self, 'app_wrapper'):
-                if hasattr(self.app_wrapper, 'app'):
-                    import tkinter
-                    if isinstance(self.app_wrapper.app, tkinter.Tk):
-                        framework = 'tk'
-
-            if framework is None:
-                try:
-                    # This is necessary for Matplotlib 3.3.0+
-                    from matplotlib import cbook
-                    framework = cbook._get_running_interactive_framework()
-                except AttributeError:
-                    # For older versions
-                    from matplotlib import backends
-                    framework = backends._get_running_interactive_framework()
+            gui = self.shell.active_eventloop
+
+            if gui in mapping:
+                return MPL_BACKENDS_TO_SPYDER[mapping[gui]]
 
             # --- Return backend according to framework
-            if framework is None:
+            if gui in [None, 'inline']:
                 # Since no interactive backend has been set yet, this is
                 # equivalent to having the inline one.
                 return 0
-            elif framework in mapping:
-                return MPL_BACKENDS_TO_SPYDER[mapping[framework]]
-            else:
-                # This covers the case of other backends (e.g. Wx or Gtk)
-                # which users can set interactively with the %matplotlib
-                # magic but not through our Preferences.
-                return -1
+
+            # This covers the case of other backends (e.g. Wx or Gtk)
+            # which users can set interactively with the %matplotlib
+            # magic but not through our Preferences.
+            return -1
         except Exception:
             return None