Remove hard-coded streamplot zorder and let mlinesLine2D.zorder to be the default

bcongdon · bcongdon · commit f08355c93f3e · 2016-09-27T08:20:30.000-05:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -4613,9 +4613,12 @@ def stackplot(self, x, *args, **kwargs):
                          label_namer=None)
     def streamplot(self, x, y, u, v, density=1, linewidth=None, color=None,
                    cmap=None, norm=None, arrowsize=1, arrowstyle='-|>',
-                   minlength=0.1, transform=None, zorder=2, start_points=None):
+                   minlength=0.1, transform=None, zorder=None,
+                   start_points=None):
         if not self._hold:
             self.cla()
+        if zorder is None:
+            zorder = mlines.Line2D.zorder
         stream_container = mstream.streamplot(self, x, y, u, v,
                                               density=density,
                                               linewidth=linewidth,
