Fix version string comparison typing

qiskit/visualization/bloch.py

@@ -395,7 +395,7 @@ def render(self, title=""):
             self.fig = plt.figure(figsize=self.figsize)
 
         if not self._ext_axes:
-            if tuple(matplotlib.__version__.split(".")) >= (3, 4, 0):
+            if tuple(int(x) for x in matplotlib.__version__.split(".")) >= (3, 4, 0):
                 self.axes = Axes3D(
                     self.fig, azim=self.view[0], elev=self.view[1], auto_add_to_figure=False
                 )

qiskit/visualization/transition_visualization.py

@@ -252,7 +252,7 @@ def visualize_transition(circuit, trace=False, saveas=None, fpg=100, spg=2):
     starting_pos = _normalize(np.array([0, 0, 1]))
 
     fig = plt.figure(figsize=(5, 5))
-    if tuple(matplotlib.__version__.split(".")) >= (3, 4, 0):
+    if tuple(int(x) for x in matplotlib.__version__.split(".")) >= (3, 4, 0):
         ax = Axes3D(fig, auto_add_to_figure=False)
         fig.add_axes(ax)
     else: