Add PEP8-compliant aliases to transAxes, transData, etc.

anntzer · anntzer · commit 33259dfa6e48 · 2018-04-14T22:44:53.000-07:00
ax.transAxes / transData / etc. are perhaps one of the most user-facing
parts of mpl that are not pep8 compliant.  Provide some PEP8-compliant
aliases for those (like myself) who are excessively (and unduly?)
bothered by that.

Note that (quite unusually for myself :-)) I am **not** proposing to
deprecate the camelCase names.
diff --git a/doc/users/next_whats_new/pep8-transattrs.rst b/doc/users/next_whats_new/pep8-transattrs.rst
@@ -0,0 +1,6 @@
+PEP8-compliant ``trans_axes``, etc. aliases to ``transAxes``, etc.
+------------------------------------------------------------------
+
+The ``Axes.transAxes``, ``transScale``, ``transLimits``, and ``transData``
+attributes can now also be accessed under the names ``trans_axes``,
+``trans_scale``, ``trans_limits``, and ``trans_data``.
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -659,6 +659,38 @@ def _set_lim_and_transforms(self):
         self._yaxis_transform = mtransforms.blended_transform_factory(
             self.transAxes, self.transData)
 
+    @property
+    def trans_axes(self):
+        return self.transAxes
+
+    @trans_axes.setter
+    def trans_axes(self, value):
+        self.transAxes = value
+
+    @property
+    def trans_scale(self):
+        return self.transScale
+
+    @trans_scale.setter
+    def trans_scale(self, value):
+        self.transScale = value
+
+    @property
+    def trans_limits(self):
+        return self.transLimits
+
+    @trans_limits.setter
+    def trans_limits(self, value):
+        self.transLimits = value
+
+    @property
+    def trans_data(self):
+        return self.transData
+
+    @trans_data.setter
+    def trans_data(self, value):
+        self.transData = value
+
     def get_xaxis_transform(self, which='grid'):
         """
         Get the transformation used for drawing x-axis labels, ticks
