Use rcParams context manager to turn off the grid when creating cax

pharshalp · pharshalp · commit 691454460cc9 · 2022-01-12T15:50:28.000-05:00
diff --git a/lib/matplotlib/colorbar.py b/lib/matplotlib/colorbar.py
@@ -1449,7 +1449,10 @@ def make_axes(parents, location=None, orientation=None, fraction=0.15,
         if panchor is not False:
             ax.set_anchor(panchor)
 
-    cax = fig.add_axes(pbcb, label="<colorbar>")
+    # pcolormesh will eventually be called on the cax so turn off the grid
+    # when creating the cax
+    with mpl.rc_context({'axes.grid': False}):
+        cax = fig.add_axes(pbcb, label="<colorbar>")
     for a in parents:
         # tell the parent it has a colorbar
         a._colorbars += [cax]
@@ -1566,7 +1569,10 @@ def make_axes_gridspec(parent, *, location=None, orientation=None,
     parent.set_anchor(panchor)
 
     fig = parent.get_figure()
-    cax = fig.add_subplot(ss_cb, label="<colorbar>")
+    # pcolormesh will eventually be called on the cax so turn off the grid
+    # when creating the cax
+    with mpl.rc_context({'axes.grid': False}):
+        cax = fig.add_subplot(ss_cb, label="<colorbar>")
     cax.set_anchor(anchor)
     cax.set_box_aspect(aspect)
     cax.set_aspect('auto')
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -1143,7 +1143,6 @@ def colorbar(
                 cax, kwargs = cbar.make_axes_gridspec(ax, **kwargs)
             else:
                 cax, kwargs = cbar.make_axes(ax, **kwargs)
-            cax.grid(visible=False, which='both', axis='both')
         else:
             userax = True
 
