matplotlib · tacaswell · Apr 27, 2020 · Apr 24, 2020 · Apr 24, 2020 · Apr 24, 2020
diff --git a/doc/api/api_changes_3.3/behaviour.rst b/doc/api/api_changes_3.3/behaviour.rst
@@ -192,3 +192,25 @@ be kept by passing it as a keyword argument to `.Axes.hist`.
 `.Legend` and `.OffsetBox` subclasses (`.PaddedBox`, `.AnchoredOffsetbox`, and
 `.AnnotationBbox`) no longer directly keep track of the visibility of their
 underlying `.Patch` artist, but instead pass that flag down to the `.Patch`.
+
+`.Legend` and `.Table` no longer allow invalid locations
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This affects legends produced on an Axes (`.Axes.legend` and `.pyplot.legend`)
+and on a Figure (`.Figure.legend` and `.pyplot.figlegend`).  Figure legends also
+no longer accept the unsupported ``'best'`` location.  Previously, invalid Axes
+locations would use ``'best'`` and invalid Figure locations would used ``'upper
+right'``.
+
+
+Passing Line2D's *drawstyle* together with *linestyle* is removed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Instead of ``plt.plot(..., linestyle="steps--")``, use ``plt.plot(...,
+linestyle="--", drawstyle="steps")``. ``ds`` is also an alias for
+``drawstyle``.
+
+Upper case color strings
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+Support for passing single-letter colors (one of "rgbcmykw") as UPPERCASE
+characters is removed; these colors are now case-sensitive (lowercase).
diff --git a/doc/api/api_changes_3.3/removals.rst b/doc/api/api_changes_3.3/removals.rst
@@ -9,6 +9,12 @@ Modules
 
 Classes, methods and attributes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+- ``artist.Artist.aname`` property (no replacement)
+
+- ``axis.Axis.iter_ticks`` (no replacement)
+
+- Support for custom backends that do not provide a
+  ``backend_bases.GraphicsContextBase.set_hatch_color`` method
 - ``backend_bases.RendererBase.strip_math()``
   (use ``cbook.strip_math()`` instead)
 
@@ -39,38 +45,68 @@ Classes, methods and attributes
 - ``backend_qt5.NavigationToolbar2QT.buttons`` property (no replacement)
 - ``backend_qt5.NavigationToolbar2QT.adj_window`` property (no replacement)
 
+- ``bezier.find_r_to_boundary_of_closedpath()`` (no replacement)
+
 - ``cbook.dedent()`` (use `inspect.cleandoc` instead)
 - ``cbook.get_label()`` (no replacement)
 - ``cbook.is_hashable()`` (use ``isinstance(..., collections.abc.Hashable)``
   instead)
 - ``cbook.iterable()`` (use ``numpy.iterable()`` instead)
 - ``cbook.safezip()`` (no replacement)
 
+- ``colorbar.ColorbarBase.get_cmap`` (use ``ScalarMappable.get_cmap`` instead)
+- ``colorbar.ColorbarBase.set_cmap`` (use ``ScalarMappable.set_cmap`` instead)
+- ``colorbar.ColorbarBase.get_clim`` (use ``ScalarMappable.get_clim`` instead)
+- ``colorbar.ColorbarBase.set_clim`` (use ``ScalarMappable.set_clim`` instead)
+- ``colorbar.ColorbarBase.set_norm`` (use ``ScalarMappable.set_norm`` instead)
+
+- ``dates.seconds()`` (no replacement)
+- ``dates.minutes()`` (no replacement)
+- ``dates.hours()`` (no replacement)
+- ``dates.weeks()`` (no replacement)
+- ``dates.strpdate2num`` and ``dates.bytespdate2num`` (use `time.strptime` or
+  `dateutil.parser.parse` or `.dates.datestr2num` instead)
+
 - ``docstring.Appender`` (no replacement)
 - ``docstring.dedent()`` (use `inspect.getdoc` instead)
 - ``docstring.copy_dedent()``
   (use ``docstring.copy()`` and `inspect.getdoc` instead)
 
+- ``font_manager.OSXInstalledFonts()`` (no replacement)
+
+- ``image.BboxImage.interp_at_native`` property (no replacement)
+
+- ``lines.Line2D.verticalOffset`` property (no replacement)
+
 - ``matplotlib.checkdep_dvipng`` (no replacement)
 - ``matplotlib.checkdep_ghostscript`` (no replacement)
 - ``matplotlib.checkdep_pdftops`` (no replacement)
 - ``matplotlib.checkdep_inkscape`` (no replacement)
 - ``matplotlib.get_py2exe_datafiles`` (no replacement)
 - ``matplotlib.tk_window_focus`` (use ``rcParams['tk.window_focus']`` instead)
 
+- ``mlab.demean()`` (use ``mlab.detrend_mean()`` instead)
+
+- ``path.get_paths_extents()``
+  (use ``path.get_path_collection_extents()`` instead)
+- ``path.Path.has_nonfinite()`` (use ``not np.isfinite(self.vertices).all()``
+  instead)
+
+- ``projections.process_projection_requirements()`` (no replacement)
+
 - ``pyplot.plotfile()`` (Instead, load the data using
   `pandas.read_csv` or `numpy.loadtxt` or similar and use regular pyplot
   functions to plot the loaded data.)
+
+- ``quiver.Quiver.color()`` (use ``Quiver.get_facecolor()`` instead)
+- ``quiver.Quiver.keyvec`` property (no replacement)
+- ``quiver.Quiver.keytext`` property (no replacement)
+
 - ``rcsetup.validate_qt4()`` (no replacement)
 - ``rcsetup.validate_qt5()`` (no replacement)
 - ``rcsetup.validate_verbose()`` (no replacement)
 - ``rcsetup.ValidateInterval`` (no replacement)
 
-- ``sphinxext.plot_directive.plot_directive()``
-  (use the class ``PlotDirective`` instead)
-- ``sphinxext.mathmpl.math_directive()``
-  (use the class ``MathDirective`` instead)
-
 - ``scale.LogTransformBase`` (use ``scale.LogTransform`` instead)
 - ``scale.InvertedLogTransformBase`` (use ``scale.InvertedLogTransform`` instead)
 - ``scale.Log10Transform`` (use ``scale.LogTransform`` instead)
@@ -79,15 +115,27 @@ Classes, methods and attributes
 - ``scale.InvertedLog2Transform`` (use ``scale.InvertedLogTransform`` instead)
 - ``scale.NaturalLogTransform`` (use ``scale.LogTransform`` instead)
 - ``scale.InvertedNaturalLogTransform`` (use ``scale.InvertedLogTransform`` instead)
+- ``scale.get_scale_docs()`` (no replacement)
+
+- ``sphinxext.plot_directive.plot_directive()``
+  (use the class ``PlotDirective`` instead)
+- ``sphinxext.mathmpl.math_directive()``
+  (use the class ``MathDirective`` instead)
 
 - ``spines.Spine.is_frame_like()`` (no replacement)
 
+- ``testing.decorators.switch_backend()`` (use ``@pytest.mark.backend``
+  decorator instead)
+
 - ``text.Text.is_math_text()`` (use ``cbook.is_math_text()`` instead)
 - ``text.TextWithDash()`` (use ``text.Annotation`` instead)
 - ``textpath.TextPath.is_math_text()`` (use ``cbook.is_math_text()`` instead)
 - ``textpath.TextPath.text_get_vertices_codes()``
   (use ``textpath.text_to_path.get_text_path()`` instead)
 
+- ``textpath.TextToPath.glyph_to_path()`` (use ``font.get_path()`` and manual
+  translation of the vertices instead)
+
 - ``ticker.OldScalarFormatter.pprint_val()`` (no replacement)
 - ``ticker.ScalarFormatter.pprint_val()`` (no replacement)
 - ``ticker.LogFormatter.pprint_val()`` (no replacement)
@@ -98,38 +146,7 @@ Classes, methods and attributes
   ``Tick.tick1line``, ``Tick.tick2line``, ``Tick.label1``,  ``Tick.label2``
   instead)
 
-- ``Artist.aname`` property (no replacement)
-- ``Axis.iter_ticks`` (no replacement)
-
-- ``image.BboxImage.interp_at_native`` property (no replacement)
-- ``lines.Line2D.verticalOffset`` property (no replacement)
-- ``bezier.find_r_to_boundary_of_closedpath()`` (no replacement)
-
-- ``quiver.Quiver.color()`` (use ``Quiver.get_facecolor()`` instead)
-- ``quiver.Quiver.keyvec`` property (no replacement)
-- ``quiver.Quiver.keytext`` property (no replacement)
-
-- ``colorbar.ColorbarBase.get_cmap`` (use ``ScalarMappable.get_cmap`` instead)
-- ``colorbar.ColorbarBase.set_cmap`` (use ``ScalarMappable.set_cmap`` instead)
-- ``colorbar.ColorbarBase.get_clim`` (use ``ScalarMappable.get_clim`` instead)
-- ``colorbar.ColorbarBase.set_clim`` (use ``ScalarMappable.set_clim`` instead)
-- ``colorbar.ColorbarBase.set_norm`` (use ``ScalarMappable.set_norm`` instead)
-
-- ``dates.seconds()`` (no replacement)
-- ``dates.minutes()`` (no replacement)
-- ``dates.hours()`` (no replacement)
-- ``dates.weeks()`` (no replacement)
-- ``dates.strpdate2num`` and ``dates.bytespdate2num`` (use `time.strptime` or
-  `dateutil.parser.parse` or `.dates.datestr2num` instead)
-
-- ``font_manager.OSXInstalledFonts()`` (no replacement)
-
-- ``mlab.demean()`` (use ``mlab.detrend_mean()`` instead)
-
-- ``projections.process_projection_requirements()`` (no replacement)
-
-- ``path.get_paths_extents()``
-  (use ``path.get_path_collection_extents()`` instead)
+- ``widgets.SpanSelector.buttonDown`` property (no replacement)
 
 - ``mplot3d.proj3d.line2d()`` (no replacement)
 - ``mplot3d.proj3d.line2d_dist()`` (no replacement)
@@ -159,8 +176,6 @@ Classes, methods and attributes
 - ``axisartist.axislines.Axes.AxisDict``
   (use ``axis_grid1.mpl_axes.Axes.AxisDict`` instead)
 
-- ``widgets.SpanSelector.buttonDown`` property (no replacement)
-
 Arguments
 ~~~~~~~~~
 - ``Axes.text()`` / ``pyplot.text()`` do not support the parameter ``withdash``
@@ -176,7 +191,8 @@ Arguments
 - The unused parameter ``interp_at_native`` of `.BboxImage` has been removed.
 - The parameter ``usetex`` of `.TextToPath.get_text_path` has been removed.
   Use ``ismath='TeX'`` instead.
-- The parameter ``block`` of ``show()`` is now keyword-only.
+- The parameter ``block`` of ``show()`` is now keyword-only, and arbitrary
+  arguments or keyword arguments are no longer accepted.
 - The parameter ``frameon`` of `.Figure.savefig` has been removed.  Use
   ``facecolor="none"`` to get a transparent background.
 - Passing a ``wx.EvtHandler`` as the first argument to ``backend_wx.TimerWx``
@@ -195,6 +211,18 @@ Arguments
   other than ``ticklabels``.
 - ``mpl_toolkits.mplot3d.art3d.Poly3DCollection.set_zsort`` does not accept
   the value ``True`` anymore. Pass the equivalent value 'average' instead.
+- `.AnchoredText` no longer accepts ``horizontalalignment`` or
+  ``verticalalignment`` keyword arguments.
+- `.ConnectionPatch` no longer accepts the ``arrow_transmuter`` and
+  ``connector`` keyword arguments, which did nothing since 3.0.
+- `.FancyArrowPatch` no longer accepts the ``arrow_transmuter`` and
+  ``connector`` keyword arguments, which did nothing since 3.0.
+- `.TextPath` no longer accepts arbitrary positional or keyword arguments.
+- `.MaxNLocator.set_params()` no longer accepts arbitrary keyword arguments.
+- `~.Axes.pie` no longer accepts and squeezes non-1D inputs; pass 1D input to
+  the ``x`` argument.
+- Passing (n, 1)-shaped error arrays to `.Axes.errorbar()` is no longer
+  supported; pass a 1D array instead.
 
 rcParams
 ~~~~~~~~

diff --git a/doc/api/prev_api_changes/api_changes_3.1.0.rst b/doc/api/prev_api_changes/api_changes_3.1.0.rst
@@ -849,8 +849,8 @@ Use the standard library's docstring manipulation tools instead, such as
 
 
 
-- `matplotlib.scale.get_scale_docs()`
-- `matplotlib.pyplot.get_scale_docs()`
+- ``matplotlib.scale.get_scale_docs()``
+- ``matplotlib.pyplot.get_scale_docs()``
 
 These are considered internal and will be removed from the public API in a
 future version.
@@ -905,7 +905,8 @@ Font Handling
 - ``backend_pdf.RendererPdf.afm_font_cache``
 - ``backend_ps.RendererPS.afmfontd``
 - ``font_manager.OSXInstalledFonts``
-- `.TextToPath.glyph_to_path` (Instead call ``font.get_path()`` and manually transform the path.)
+- ``.TextToPath.glyph_to_path`` (Instead call ``font.get_path()`` and manually
+  transform the path.)
 
 
 Date related functions
@@ -1011,7 +1012,7 @@ Path tools
 
 Use `~.path.get_path_collection_extents` instead.
 
-- `.Path.has_nonfinite` attribute
+- ``.Path.has_nonfinite`` attribute
 
 Use ``not np.isfinite(path.vertices).all()`` instead.
 

diff --git a/doc/missing-references.json b/doc/missing-references.json
@@ -1369,9 +1369,6 @@
     "matplotlib.patches.Patch.__init__": [
       "doc/devel/documenting_mpl.rst:696"
     ],
-    "matplotlib.pyplot.get_scale_docs()": [
-      "doc/api/prev_api_changes/api_changes_3.1.0.rst:853"
-    ],
     "matplotlib.sphinxext.mathmpl": [
       "doc/users/prev_whats_new/whats_new_3.0.rst:225"
     ],
@@ -1543,4 +1540,4 @@
       "lib/mpl_toolkits/mplot3d/axes3d.py:docstring of mpl_toolkits.mplot3d.axes3d.Axes3D.get_ylim3d:24"
     ]
   }
-}
+}
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -2915,7 +2915,7 @@ def pie(self, x, explode=None, labels=None, colors=None,
 
         Parameters
         ----------
-        x : array-like
+        x : 1D array-like
             The wedge sizes.
 
         explode : array-like, default: None
@@ -2999,12 +2999,8 @@ def pie(self, x, explode=None, labels=None, colors=None,
         # The use of float32 is "historical", but can't be changed without
         # regenerating the test baselines.
         x = np.asarray(x, np.float32)
-        if x.ndim != 1 and x.squeeze().ndim <= 1:
-            cbook.warn_deprecated(
-                "3.1", message="Non-1D inputs to pie() are currently "
-                "squeeze()d, but this behavior is deprecated since %(since)s "
-                "and will be removed %(removal)s; pass a 1D array instead.")
-            x = np.atleast_1d(x.squeeze())
+        if x.ndim > 1:
+            raise ValueError("x must be 1D")
 
         if np.any(x < 0):
             raise ValueError("Wedge sizes 'x' must be non negative values")
@@ -3372,7 +3368,7 @@ def xywhere(xs, ys, mask):
             ys = [thisy for thisy, b in zip(ys, mask) if b]
             return xs, ys
 
-        def extract_err(err, data):
+        def extract_err(name, err, data):
             """
             Private function to parse *err* and subtract/add it to *data*.
 
@@ -3384,20 +3380,9 @@ def extract_err(err, data):
                 iter(b)
             except (TypeError, ValueError):
                 a = b = err  # Symmetric error: 1D iterable.
-            # This could just be `np.ndim(a) > 1 and np.ndim(b) > 1`, except
-            # for the (undocumented, but tested) support for (n, 1) arrays.
-            a_sh = np.shape(a)
-            b_sh = np.shape(b)
-            if (len(a_sh) > 2 or (len(a_sh) == 2 and a_sh[1] != 1)
-                    or len(b_sh) > 2 or (len(b_sh) == 2 and b_sh[1] != 1)):
+            if np.ndim(a) > 1 or np.ndim(b) > 1:
                 raise ValueError(
-                    "err must be a scalar or a 1D or (2, n) array-like")
-            if len(a_sh) == 2 or len(b_sh) == 2:
-                cbook.warn_deprecated(
-                    "3.1", message="Support for passing a (n, 1)-shaped error "
-                    "array to errorbar() is deprecated since Matplotlib "
-                    "%(since)s and will be removed %(removal)s; pass a 1D "
-                    "array instead.")
+                    f"{name}err must be a scalar or a 1D or (2, n) array-like")
             # Using list comprehensions rather than arrays to preserve units.
             for e in [a, b]:
                 if len(data) != len(e):
@@ -3409,7 +3394,7 @@ def extract_err(err, data):
             return low, high
 
         if xerr is not None:
-            left, right = extract_err(xerr, x)
+            left, right = extract_err('x', xerr, x)
             # select points without upper/lower limits in x and
             # draw normal errorbars for these points
             noxlims = ~(xlolims | xuplims)
@@ -3458,7 +3443,7 @@ def extract_err(err, data):
                                                   **eb_cap_style))
 
         if yerr is not None:
-            lower, upper = extract_err(yerr, y)
+            lower, upper = extract_err('y', yerr, y)
             # select points without upper/lower limits in y and
             # draw normal errorbars for these points
             noylims = ~(lolims | uplims)

diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
@@ -239,13 +239,7 @@ def trigger_manager_draw(manager):
         manager.show()
 
     @staticmethod
-    def show(*args, block=None, **kwargs):
-        if args or kwargs:
-            cbook.warn_deprecated(
-                "3.1", message="Passing arguments to show(), other than "
-                "passing 'block' by keyword, is deprecated %(since)s, and "
-                "support for it will be removed %(removal)s.")
-
+    def show(block=None):
         ## TODO: something to do when keyword block==False ?
         from matplotlib._pylab_helpers import Gcf
 

diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -302,14 +302,7 @@ def draw(self, renderer):
 
         if self._hatch:
             gc.set_hatch(self._hatch)
-            try:
-                gc.set_hatch_color(self._hatch_color)
-            except AttributeError:
-                # if we end up with a GC that does not have this method
-                cbook.warn_deprecated(
-                    "3.1", message="Your backend does not support setting the "
-                    "hatch color; such backends will become unsupported in "
-                    "Matplotlib 3.3.")
+            gc.set_hatch_color(self._hatch_color)
 
         if self.get_sketch_params() is not None:
             gc.set_sketch_params(*self.get_sketch_params())

diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -198,17 +198,11 @@ def _to_rgba_no_colorcycle(c, alpha=None):
             # This may turn c into a non-string, so we check again below.
             c = _colors_full_map[c]
         except KeyError:
-            try:
-                c = _colors_full_map[c.lower()]
-            except KeyError:
-                pass
-            else:
-                if len(orig_c) == 1:
-                    cbook.warn_deprecated(
-                        "3.1", message="Support for uppercase "
-                        "single-letter colors is deprecated since Matplotlib "
-                        "%(since)s and will be removed %(removal)s; please "
-                        "use lowercase instead.")
+            if len(orig_c) != 1:
+                try:
+                    c = _colors_full_map[c.lower()]
+                except KeyError:
+                    pass
     if isinstance(c, str):
         # hex color in #rrggbb format.
         match = re.match(r"\A#[a-fA-F0-9]{6}\Z", c)