Merge pull request #447 from nschloe/mpl3.3.3-fix

fix for mpl 3.3.3

Author: nschloe

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = tikzplotlib
-version = 0.9.4
+version = 0.9.5
 author = Nico Schlömer
 author_email = [email protected]
 description = Convert matplotlib figures into TikZ/PGFPlots

test/helpers.py

@@ -44,7 +44,7 @@ def assert_equality(
     this_dir = os.path.dirname(os.path.abspath(__file__))
     with open(os.path.join(this_dir, filename), encoding="utf-8") as f:
         reference = f.read()
-    assert reference == code, _unidiff_output(reference, code)
+    assert reference == code, filename + "\n" + _unidiff_output(reference, code)
 
     if assert_compilation:
         plot()

tikzplotlib/_axes.py

@@ -295,9 +295,23 @@ def _grid(self, obj, data):
         # Don't use get_{x,y}gridlines for gridlines; see discussion on
         # <http://sourceforge.net/p/matplotlib/mailman/message/25169234/> Coordinate of
         # the lines are entirely meaningless, but styles (colors,...) are respected.
-        if obj.xaxis._gridOnMajor:
+
+        try:
+            # mpl 3.3.3+
+            # <https://github.com/matplotlib/matplotlib/pull/18769>
+            has_major_xgrid = obj.xaxis._major_tick_kw["gridOn"]
+            has_minor_xgrid = obj.xaxis._minor_tick_kw["gridOn"]
+            has_major_ygrid = obj.yaxis._major_tick_kw["gridOn"]
+            has_minor_ygrid = obj.yaxis._minor_tick_kw["gridOn"]
+        except KeyError:
+            has_major_xgrid = obj.xaxis._gridOnMajor
+            has_minor_xgrid = obj.xaxis._gridOnMinor
+            has_major_ygrid = obj.yaxis._gridOnMajor
+            has_minor_ygrid = obj.yaxis._gridOnMinor
+
+        if has_major_xgrid:
             self.axis_options.append("xmajorgrids")
-        if obj.xaxis._gridOnMinor:
+        if has_minor_xgrid:
             self.axis_options.append("xminorgrids")
 
         xlines = obj.get_xgridlines()
@@ -307,9 +321,9 @@ def _grid(self, obj, data):
             if col != "black":
                 self.axis_options.append(f"x grid style={{{col}}}")
 
-        if obj.yaxis._gridOnMajor:
+        if has_major_ygrid:
             self.axis_options.append("ymajorgrids")
-        if obj.yaxis._gridOnMinor:
+        if has_minor_ygrid:
             self.axis_options.append("yminorgrids")
 
         ylines = obj.get_ygridlines()