matplotlib
diff --git a/‎doc/api/next_api_changes/2018-10-04-AL-deprecations.rst
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diff --git a/‎examples/mplot3d/surface3d_3.py
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diff --git a/‎examples/pyplots/whats_new_1_subplot3d.py
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diff --git a/‎lib/matplotlib/cbook/deprecation.py
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diff --git a/‎lib/mpl_toolkits/mplot3d/axes3d.py
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+15-5Lines changed: 15 additions & 5 deletions b/‎lib/mpl_toolkits/mplot3d/axes3d.py
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@@ -0,0 +1,5 @@
+Deprecations
+````````````
+
+``axes3d.Axes3D.w_xaxis``, ``.w_yaxis``, and ``.w_zaxis`` are deprecated (use
+``.xaxis``, ``.yaxis``, and ``.zaxis`` instead).
@@ -36,6 +36,6 @@
 
 # Customize the z axis.
 ax.set_zlim(-1, 1)
-ax.w_zaxis.set_major_locator(LinearLocator(6))
+ax.zaxis.set_major_locator(LinearLocator(6))
 
 plt.show()
@@ -23,8 +23,8 @@
                        linewidth=0, antialiased=False)
 ax.set_zlim3d(-1.01, 1.01)
 
-#ax.w_zaxis.set_major_locator(LinearLocator(10))
-#ax.w_zaxis.set_major_formatter(FormatStrFormatter('%.03f'))
+#ax.zaxis.set_major_locator(LinearLocator(10))
+#ax.zaxis.set_major_formatter(FormatStrFormatter('%.03f'))
 
 fig.colorbar(surf, shrink=0.5, aspect=5)
 
 
@@ -24,16 +24,16 @@ class MatplotlibDeprecationWarning(UserWarning):
 def _generate_deprecation_warning(
         since, message='', name='', alternative='', pending=False,
         obj_type='attribute', addendum='', *, removal=''):
-
-    if removal == "":
-        removal = {"2.2": "in 3.1", "3.0": "in 3.2", "3.1": "in 3.3"}.get(
-            since, "two minor releases later")
-    elif removal:
-        if pending:
+    if pending:
+        if removal:
             raise ValueError(
                 "A pending deprecation cannot have a scheduled removal")
-        removal = "in {}".format(removal)
-
+    else:
+        if removal:
+            removal = "in {}".format(removal)
+        else:
+            removal = {"2.2": "in 3.1", "3.0": "in 3.2", "3.1": "in 3.3"}.get(
+                since, "two minor releases later")
     if not message:
         message = (
             "\nThe %(name)s %(obj_type)s"
@@ -46,10 +46,8 @@ def _generate_deprecation_warning(
             + "."
             + (" Use %(alternative)s instead." if alternative else "")
             + (" %(addendum)s" if addendum else ""))
-
     warning_cls = (PendingDeprecationWarning if pending
                    else MatplotlibDeprecationWarning)
-
     return warning_cls(message % dict(
         func=name, name=name, obj_type=obj_type, since=since, removal=removal,
         alternative=alternative, addendum=addendum))
 
@@ -205,18 +205,28 @@ def _init_axis(self):
                                   self.xy_dataLim.intervaly, self)
         self.zaxis = axis3d.ZAxis('z', self.zz_viewLim.intervalx,
                                   self.zz_dataLim.intervalx, self)
-        # Provide old aliases
-        self.w_xaxis = self.xaxis
-        self.w_yaxis = self.yaxis
-        self.w_zaxis = self.zaxis
-
         for ax in self.xaxis, self.yaxis, self.zaxis:
             ax.init3d()
 
     def get_zaxis(self):
         '''Return the ``ZAxis`` (`~.axis3d.Axis`) instance.'''
         return self.zaxis
 
+    @cbook.deprecated("3.1", alternative="xaxis", pending=True)
+    @property
+    def w_xaxis(self):
+        return self.xaxis
+
+    @cbook.deprecated("3.1", alternative="yaxis", pending=True)
+    @property
+    def w_yaxis(self):
+        return self.yaxis
+
+    @cbook.deprecated("3.1", alternative="zaxis", pending=True)
+    @property
+    def w_zaxis(self):
+        return self.zaxis
+
     def _get_axis_list(self):
         return super()._get_axis_list() + (self.zaxis, )