Backport PR #44523: COMPAT: Matplotlib 3.5.0 (#44555)

Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

Author: simonjayhawkins

pandas/plotting/_matplotlib/compat.py

@@ -24,3 +24,4 @@ def inner():
 mpl_ge_3_2_0 = _mpl_version("3.2.0", operator.ge)
 mpl_ge_3_3_0 = _mpl_version("3.3.0", operator.ge)
 mpl_ge_3_4_0 = _mpl_version("3.4.0", operator.ge)
+mpl_ge_3_5_0 = _mpl_version("3.5.0", operator.ge)

pandas/plotting/_matplotlib/converter.py

@@ -353,8 +353,8 @@ def get_locator(self, dmin, dmax):
             locator = MilliSecondLocator(self.tz)
             locator.set_axis(self.axis)
 
-            locator.set_view_interval(*self.axis.get_view_interval())
-            locator.set_data_interval(*self.axis.get_data_interval())
+            locator.axis.set_view_interval(*self.axis.get_view_interval())
+            locator.axis.set_data_interval(*self.axis.get_data_interval())
             return locator
 
         return dates.AutoDateLocator.get_locator(self, dmin, dmax)

pandas/plotting/_matplotlib/core.py

@@ -983,6 +983,7 @@ def _plot_colorbar(self, ax: Axes, **kwds):
         # use the last one which contains the latest information
         # about the ax
         img = ax.collections[-1]
+        ax.grid(False)
         cbar = self.fig.colorbar(img, ax=ax, **kwds)
 
         if mpl_ge_3_0_0():

pandas/tests/plotting/common.py

@@ -45,6 +45,8 @@ def setup_method(self, method):
 
         from pandas.plotting._matplotlib import compat
 
+        self.compat = compat
+
         mpl.rcdefaults()
 
         self.start_date_to_int64 = 812419200000000000
@@ -569,6 +571,12 @@ def _unpack_cycler(self, rcParams, field="color"):
         """
         return [v[field] for v in rcParams["axes.prop_cycle"]]
 
+    def get_x_axis(self, ax):
+        return ax._shared_axes["x"] if self.compat.mpl_ge_3_5_0() else ax._shared_x_axes
+
+    def get_y_axis(self, ax):
+        return ax._shared_axes["y"] if self.compat.mpl_ge_3_5_0() else ax._shared_y_axes
+
 
 def _check_plot_works(f, filterwarnings="always", default_axes=False, **kwargs):
     """

pandas/tests/plotting/frame/test_frame.py

@@ -525,8 +525,8 @@ def test_area_sharey_dont_overwrite(self):
         df.plot(ax=ax1, kind="area")
         df.plot(ax=ax2, kind="area")
 
-        assert ax1._shared_y_axes.joined(ax1, ax2)
-        assert ax2._shared_y_axes.joined(ax1, ax2)
+        assert self.get_y_axis(ax1).joined(ax1, ax2)
+        assert self.get_y_axis(ax2).joined(ax1, ax2)
 
     def test_bar_linewidth(self):
         df = DataFrame(np.random.randn(5, 5))

pandas/tests/plotting/test_common.py

@@ -39,4 +39,6 @@ def test__gen_two_subplots_with_ax(self):
         next(gen)
         axes = fig.get_axes()
         assert len(axes) == 1
-        assert axes[0].get_geometry() == (2, 1, 2)
+        subplot_geometry = list(axes[0].get_subplotspec().get_geometry()[:-1])
+        subplot_geometry[-1] += 1
+        assert subplot_geometry == [2, 1, 2]

pandas/tests/plotting/test_hist_method.py

@@ -728,35 +728,35 @@ def test_axis_share_x(self):
         ax1, ax2 = df.hist(column="height", by=df.gender, sharex=True)
 
         # share x
-        assert ax1._shared_x_axes.joined(ax1, ax2)
-        assert ax2._shared_x_axes.joined(ax1, ax2)
+        assert self.get_x_axis(ax1).joined(ax1, ax2)
+        assert self.get_x_axis(ax2).joined(ax1, ax2)
 
         # don't share y
-        assert not ax1._shared_y_axes.joined(ax1, ax2)
-        assert not ax2._shared_y_axes.joined(ax1, ax2)
+        assert not self.get_y_axis(ax1).joined(ax1, ax2)
+        assert not self.get_y_axis(ax2).joined(ax1, ax2)
 
     def test_axis_share_y(self):
         df = self.hist_df
         ax1, ax2 = df.hist(column="height", by=df.gender, sharey=True)
 
         # share y
-        assert ax1._shared_y_axes.joined(ax1, ax2)
-        assert ax2._shared_y_axes.joined(ax1, ax2)
+        assert self.get_y_axis(ax1).joined(ax1, ax2)
+        assert self.get_y_axis(ax2).joined(ax1, ax2)
 
         # don't share x
-        assert not ax1._shared_x_axes.joined(ax1, ax2)
-        assert not ax2._shared_x_axes.joined(ax1, ax2)
+        assert not self.get_x_axis(ax1).joined(ax1, ax2)
+        assert not self.get_x_axis(ax2).joined(ax1, ax2)
 
     def test_axis_share_xy(self):
         df = self.hist_df
         ax1, ax2 = df.hist(column="height", by=df.gender, sharex=True, sharey=True)
 
         # share both x and y
-        assert ax1._shared_x_axes.joined(ax1, ax2)
-        assert ax2._shared_x_axes.joined(ax1, ax2)
+        assert self.get_x_axis(ax1).joined(ax1, ax2)
+        assert self.get_x_axis(ax2).joined(ax1, ax2)
 
-        assert ax1._shared_y_axes.joined(ax1, ax2)
-        assert ax2._shared_y_axes.joined(ax1, ax2)
+        assert self.get_y_axis(ax1).joined(ax1, ax2)
+        assert self.get_y_axis(ax2).joined(ax1, ax2)
 
     @pytest.mark.parametrize(
         "histtype, expected",

pandas/tests/plotting/test_series.py

@@ -154,8 +154,8 @@ def test_area_sharey_dont_overwrite(self):
         abs(self.ts).plot(ax=ax1, kind="area")
         abs(self.ts).plot(ax=ax2, kind="area")
 
-        assert ax1._shared_y_axes.joined(ax1, ax2)
-        assert ax2._shared_y_axes.joined(ax1, ax2)
+        assert self.get_y_axis(ax1).joined(ax1, ax2)
+        assert self.get_y_axis(ax2).joined(ax1, ax2)
 
     def test_label(self):
         s = Series([1, 2])