Minor bugfixes - incl. for pathcollection contours

pyrolite/util/plot/axes.py

@@ -1,6 +1,8 @@
 """
 Functions for creating, ordering and modifying :class:`~matplolib.axes.Axes`.
 """
+import warnings
+
 import matplotlib.pyplot as plt
 import numpy as np
 from mpl_toolkits.axes_grid1 import make_axes_locatable

pyrolite/util/plot/interpolation.py

@@ -114,15 +114,17 @@ def get_contour_paths(ax, resolution=100):
     linecolls = [
         c
         for c in ax.collections
-        if isinstance(c, matplotlib.collections.LineCollection)
+        # contours/default lines don't have markers - allows distinguishing scatter
+        if isinstance(c, matplotlib.collections.PathCollection)
+        and c.get_sizes().size == 0
     ]
-    rgba = [[int(c) for c in lc.get_edgecolors().flatten() * 255] for lc in linecolls]
+    rgba = [lc.get_edgecolors() for lc in linecolls]
     styles = [{"color": c} for c in rgba]
     names = [None for lc in linecolls]
-    if (len(ax.artists) == len(linecolls)) and all(
-        [a.get_text() != "" for a in ax.artists]
+    if (len(ax.texts) == len(linecolls)) and all(
+        [a.get_text() != "" for a in ax.texts]
     ):
-        names = [a.get_text() for a in ax.artists]
+        names = [a.get_text() for a in ax.texts]
     return (
         [
             [