escape ampersand as well

Author: nschloe

test/test_escape_chars_reference.tex

@@ -3,13 +3,13 @@
 \begin{axis}[
 tick align=outside,
 tick pos=left,
-title={Foo & Bar Dogs\_N\_Cats},
+title={Foo \& Bar Dogs\_N\_Cats},
 x grid style={white!69.01960784313725!black},
-xlabel={Foo & Bar Dogs\_N\_Cats},
+xlabel={Foo \& Bar Dogs\_N\_Cats},
 xmin=-0.055, xmax=0.055,
 xtick style={color=black},
 y grid style={white!69.01960784313725!black},
-ylabel={Foo & Bar Dogs\_N\_Cats},
+ylabel={Foo \& Bar Dogs\_N\_Cats},
 ymin=-0.055, ymax=0.055,
 ytick style={color=black}
 ]

tikzplotlib/axes.py

@@ -1,10 +1,14 @@
 import matplotlib as mpl
 import numpy
-from matplotlib.backends import backend_pgf as mpl_backend_pgf
+from matplotlib.backends.backend_pgf import common_texification as mpl_common_texification
 
 from . import color
 
 
+def _common_texification(string):
+    return mpl_common_texification(string).replace("&", "\\&")
+
+
 class Axes:
     def __init__(self, data, obj):  # noqa: C901
         """Returns the PGFPlots code for an axis environment.
@@ -36,14 +40,14 @@ def __init__(self, data, obj):  # noqa: C901
         title = obj.get_title()
         data["current axis title"] = title
         if title:
-            title = mpl_backend_pgf.common_texification(title)
+            title = _common_texification(title)
             self.axis_options.append(u"title={{{}}}".format(title))
 
         # get axes titles
         xlabel = obj.get_xlabel()
         xrotation = obj.xaxis.get_label().get_rotation()
         if xlabel:
-            xlabel = mpl_backend_pgf.common_texification(xlabel)
+            xlabel = _common_texification(xlabel)
             self.axis_options.append(u"xlabel={{{}}}".format(xlabel))
             if xrotation != 0:
                 self.axis_options.append(
@@ -52,7 +56,7 @@ def __init__(self, data, obj):  # noqa: C901
         ylabel = obj.get_ylabel()
         yrotation = obj.yaxis.get_label().get_rotation()
         if ylabel:
-            ylabel = mpl_backend_pgf.common_texification(ylabel)
+            ylabel = _common_texification(ylabel)
             self.axis_options.append(u"ylabel={{{}}}".format(ylabel))
             if yrotation != 90:
                 self.axis_options.append(
@@ -559,7 +563,7 @@ def _get_ticks(data, xy, ticks, ticklabels):
         # store the label anyway
         label = ticklabel.get_text()
         if ticklabel.get_visible():
-            label = mpl_backend_pgf.common_texification(label)
+            label = _common_texification(label)
             pgfplots_ticklabels.append(label)
         else:
             is_label_required = True