matplotlib · tacaswell · Jan 9, 2020 · Jan 8, 2020
diff --git a/doc/api/next_api_changes/removals.rst b/doc/api/next_api_changes/removals.rst
@@ -115,3 +115,14 @@ Arguments
 - 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 ``frameon`` of `.Figure.savefig` has been removed.  Use
+  ``facecolor="none"`` to get a transparent background.
+
+rcParams
+~~~~~~~~
+- The ``text.latex.unicode`` rcParam has been removed, with no replacement.
+  Matplotlib now always supports unicode in usetex.
+- The ``savefig.frameon`` rcParam has been removed.  Set
+  :rc:`savefig.facecolor` to "none" to get a transparent background.
+- The ``pgf.debug``, ``verbose.fileo`` and ``verbose.verbose.level`` rcParams,
+  which had no effect, have been removed.
diff --git a/examples/misc/custom_projection.py b/examples/misc/custom_projection.py
@@ -40,10 +40,7 @@ def __init__(self, round_to=1.0):
 
         def __call__(self, x, pos=None):
             degrees = round(np.rad2deg(x) / self._round_to) * self._round_to
-            if rcParams['text.usetex'] and not rcParams['text.latex.unicode']:
-                return r"$%0.0f^\circ$" % degrees
-            else:
-                return "%0.0f\N{DEGREE SIGN}" % degrees
+            return f"{degrees:0.0f}\N{DEGREE SIGN}"
 
     RESOLUTION = 75
 

diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -616,17 +616,12 @@ def gen_candidates():
 # rcParams deprecated; some can manually be mapped to another key.
 # Values are tuples of (version, new_name_or_None).
 _deprecated_ignore_map = {
-    'pgf.debug': ('3.0', None),
 }
 
 # rcParams deprecated; can use None to suppress warnings; remain actually
 # listed in the rcParams (not included in _all_deprecated).
 # Values are tuples of (version,)
 _deprecated_remain_as_none = {
-    'text.latex.unicode': ('3.0',),
-    'savefig.frameon': ('3.1',),
-    'verbose.fileo': ('3.1',),
-    'verbose.level': ('3.1',),
 }
 
 

diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -2152,14 +2152,6 @@ def savefig(self, fname, *, transparent=None, **kwargs):
         """
 
         kwargs.setdefault('dpi', rcParams['savefig.dpi'])
-        if "frameon" in kwargs:
-            cbook.warn_deprecated("3.1", name="frameon", obj_type="kwarg",
-                                  alternative="facecolor")
-            frameon = kwargs.pop("frameon")
-            if frameon is None:
-                frameon = dict.__getitem__(rcParams, 'savefig.frameon')
-        else:
-            frameon = False  # Won't pass "if frameon:" below.
         if transparent is None:
             transparent = rcParams['savefig.transparent']
 
@@ -2177,15 +2169,8 @@ def savefig(self, fname, *, transparent=None, **kwargs):
             kwargs.setdefault('facecolor', rcParams['savefig.facecolor'])
             kwargs.setdefault('edgecolor', rcParams['savefig.edgecolor'])
 
-        if frameon:
-            original_frameon = self.patch.get_visible()
-            self.patch.set_visible(frameon)
-
         self.canvas.print_figure(fname, **kwargs)
 
-        if frameon:
-            self.patch.set_visible(original_frameon)
-
         if transparent:
             for ax, cc in zip(self.axes, original_axes_colors):
                 ax.patch.set_facecolor(cc[0])

diff --git a/lib/matplotlib/projections/geo.py b/lib/matplotlib/projections/geo.py
@@ -13,6 +13,7 @@
 
 class GeoAxes(Axes):
     """An abstract base class for geographic projections."""
+
     class ThetaFormatter(Formatter):
         """
         Used to format the theta tick labels.  Converts the native
@@ -23,10 +24,7 @@ def __init__(self, round_to=1.0):
 
         def __call__(self, x, pos=None):
             degrees = round(np.rad2deg(x) / self._round_to) * self._round_to
-            if rcParams['text.usetex'] and not rcParams['text.latex.unicode']:
-                return r"$%0.0f^\circ$" % degrees
-            else:
-                return "%0.0f\N{DEGREE SIGN}" % degrees
+            return f"{degrees:0.0f}\N{DEGREE SIGN}"
 
     RESOLUTION = 75
 

diff --git a/lib/matplotlib/projections/polar.py b/lib/matplotlib/projections/polar.py
@@ -165,18 +165,12 @@ def __call__(self, x, pos=None):
         vmin, vmax = self.axis.get_view_interval()
         d = np.rad2deg(abs(vmax - vmin))
         digits = max(-int(np.log10(d) - 1.5), 0)
-
-        if rcParams['text.usetex'] and not rcParams['text.latex.unicode']:
-            format_str = r"${value:0.{digits:d}f}^\circ$"
-            return format_str.format(value=np.rad2deg(x), digits=digits)
-        else:
-            # we use unicode, rather than mathtext with \circ, so
-            # that it will work correctly with any arbitrary font
-            # (assuming it has a degree sign), whereas $5\circ$
-            # will only work correctly with one of the supported
-            # math fonts (Computer Modern and STIX)
-            format_str = "{value:0.{digits:d}f}\N{DEGREE SIGN}"
-            return format_str.format(value=np.rad2deg(x), digits=digits)
+        # Use unicode rather than mathtext with \circ, so that it will work
+        # correctly with any arbitrary font (assuming it has a degree sign),
+        # whereas $5\circ$ will only work correctly with one of the supported
+        # math fonts (Computer Modern and STIX).
+        return ("{value:0.{digits:d}f}\N{DEGREE SIGN}"
+                .format(value=np.rad2deg(x), digits=digits))
 
 
 class _AxisWrapper:

diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
@@ -441,11 +441,6 @@ def validate_mathtext_default(s):
      'center_baseline'])
 
 
-_validate_verbose = ValidateInStrings(
-    'verbose',
-    ['silent', 'helpful', 'debug', 'debug-annoying'])
-
-
 def validate_whiskers(s):
     if s == 'range':
         cbook.warn_deprecated(
@@ -1013,10 +1008,6 @@ def validate_webagg_address(s):
     'interactive':       [False, validate_bool],
     'timezone':          ['UTC', validate_string],
 
-    # the verbosity setting
-    'verbose.level': ['silent', _validate_verbose],
-    'verbose.fileo': ['sys.stdout', validate_string],
-
     # line props
     'lines.linewidth':       [1.5, validate_float],  # line width in points
     'lines.linestyle':       ['-', _validate_linestyle],  # solid line
@@ -1133,7 +1124,6 @@ def validate_webagg_address(s):
     # text props
     'text.color':          ['black', validate_color],
     'text.usetex':         [False, validate_bool],
-    'text.latex.unicode':  [True, validate_bool],
     'text.latex.preamble': ['', _validate_tex_preamble],
     'text.latex.preview':  [False, validate_bool],
     'text.hinting':        ['auto', validate_hinting],
@@ -1364,7 +1354,6 @@ def validate_webagg_address(s):
     'savefig.dpi':         ['figure', validate_dpi],  # DPI
     'savefig.facecolor':   ['white', validate_color],
     'savefig.edgecolor':   ['white', validate_color],
-    'savefig.frameon':     [True, validate_bool],
     'savefig.orientation': ['portrait', validate_orientation],
     'savefig.jpeg_quality': [95, validate_int],
     # value checked by backend at runtime
@@ -1394,7 +1383,6 @@ def validate_webagg_address(s):
     'pdf.use14corefonts': [False, validate_bool],
     'pdf.fonttype':     [3, validate_fonttype],  # 3 (Type3) or 42 (Truetype)
 
-    'pgf.debug':     [False, validate_bool],  # output debug information
     # choose latex application for creating pdf files (xelatex/lualatex)
     'pgf.texsystem': ['xelatex', validate_pgf_texsystem],
     # use matplotlib rc settings for font configuration

diff --git a/lib/matplotlib/texmanager.py b/lib/matplotlib/texmanager.py
@@ -95,9 +95,9 @@ class TexManager:
         'computer modern typewriter': ('cmtt', r'\usepackage{type1ec}')}
 
     _rc_cache = None
-    _rc_cache_keys = (
-        ('text.latex.preamble', 'text.latex.unicode', 'text.latex.preview',
-         'font.family') + tuple('font.' + n for n in font_families))
+    _rc_cache_keys = [
+        'text.latex.preamble', 'text.latex.preview', 'font.family',
+        *['font.' + n for n in font_families]]
 
     @functools.lru_cache()  # Always return the same instance.
     def __new__(cls):
@@ -193,18 +193,15 @@ def get_custom_preamble(self):
         return rcParams['text.latex.preamble']
 
     def _get_preamble(self):
-        unicode_preamble = "\n".join([
-            r"\usepackage[utf8]{inputenc}",
-            r"\DeclareUnicodeCharacter{2212}{\ensuremath{-}}",
-        ]) if rcParams["text.latex.unicode"] else ""
         return "\n".join([
             r"\documentclass{article}",
             # Pass-through \mathdefault, which is used in non-usetex mode to
             # use the default text font but was historically suppressed in
             # usetex mode.
             r"\newcommand{\mathdefault}[1]{#1}",
             self._font_preamble,
-            unicode_preamble,
+            r"\usepackage[utf8]{inputenc}",
+            r"\DeclareUnicodeCharacter{2212}{\ensuremath{-}}",
             self.get_custom_preamble(),
         ])
 
@@ -219,26 +216,17 @@ def make_tex(self, tex, fontsize):
         fontcmd = {'sans-serif': r'{\sffamily %s}',
                    'monospace': r'{\ttfamily %s}'}.get(self.font_family,
                                                        r'{\rmfamily %s}')
-        tex = fontcmd % tex
 
-        s = r"""
+        Path(texfile).write_text(
+            r"""
 %s
 \usepackage[papersize={72in,72in},body={70in,70in},margin={1in,1in}]{geometry}
 \pagestyle{empty}
 \begin{document}
 \fontsize{%f}{%f}%s
 \end{document}
-""" % (self._get_preamble(), fontsize, fontsize * 1.25, tex)
-        with open(texfile, 'wb') as fh:
-            if rcParams['text.latex.unicode']:
-                fh.write(s.encode('utf8'))
-            else:
-                try:
-                    fh.write(s.encode('ascii'))
-                except UnicodeEncodeError:
-                    _log.info("You are using unicode and latex, but have not "
-                              "enabled the 'text.latex.unicode' rcParam.")
-                    raise
+""" % (self._get_preamble(), fontsize, fontsize * 1.25, fontcmd % tex),
+            encoding='utf-8')
 
         return texfile
 
@@ -259,12 +247,12 @@ def make_tex_preview(self, tex, fontsize):
         fontcmd = {'sans-serif': r'{\sffamily %s}',
                    'monospace': r'{\ttfamily %s}'}.get(self.font_family,
                                                        r'{\rmfamily %s}')
-        tex = fontcmd % tex
 
         # newbox, setbox, immediate, etc. are used to find the box
         # extent of the rendered text.
 
-        s = r"""
+        Path(texfile).write_text(
+            r"""
 %s
 \usepackage[active,showbox,tightpage]{preview}
 \usepackage[papersize={72in,72in},body={70in,70in},margin={1in,1in}]{geometry}
@@ -279,17 +267,8 @@ def make_tex_preview(self, tex, fontsize):
 {\fontsize{%f}{%f}%s}
 \end{preview}
 \end{document}
-""" % (self._get_preamble(), fontsize, fontsize * 1.25, tex)
-        with open(texfile, 'wb') as fh:
-            if rcParams['text.latex.unicode']:
-                fh.write(s.encode('utf8'))
-            else:
-                try:
-                    fh.write(s.encode('ascii'))
-                except UnicodeEncodeError:
-                    _log.info("You are using unicode and latex, but have not "
-                              "enabled the 'text.latex.unicode' rcParam.")
-                    raise
+""" % (self._get_preamble(), fontsize, fontsize * 1.25, fontcmd % tex),
+            encoding='utf-8')
 
         return texfile
 

diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -284,15 +284,9 @@ def fix_minus(s):
         helper method to perform such a replacement when it is enabled via
         :rc:`axes.unicode_minus`.
         """
-        # Additionally, we disable the replacement when using usetex without
-        # unicode support (this is deprecated, i.e., in a future version,
-        # unicode support will always be enabled).
-        if (rcParams['axes.unicode_minus']
-                and (rcParams['text.latex.unicode']
-                     or not rcParams['text.usetex'])):
-            return s.replace('-', '\N{MINUS SIGN}')
-        else:
-            return s
+        return (s.replace('-', '\N{MINUS SIGN}')
+                if rcParams['axes.unicode_minus']
+                else s)
 
     def _set_locator(self, locator):
         """Subclasses may want to override this to set a locator."""