Use kind instead of issubclass

mdboom · mdboom · commit 08e98dae25ef · 2015-12-31T09:42:11.000-05:00
diff --git a/lib/matplotlib/backends/backend_agg.py b/lib/matplotlib/backends/backend_agg.py
@@ -403,7 +403,7 @@ def post_processing(image, dpi):
             img, ox, oy = post_processing(img.reshape((h, w, 4)) / 255.,
                                           self.dpi)
             gc = self.new_gc()
-            if issubclass(img.dtype.type, np.floating):
+            if img.dtype.kind == 'f':
                 img = np.asarray(img * 255., np.uint8)
             img = img[::-1]
             self._renderer.draw_image(
diff --git a/lib/matplotlib/cm.py b/lib/matplotlib/cm.py
@@ -263,7 +263,7 @@ def to_rgba(self, x, alpha=None, bytes=False, norm=True):
         rgba = self.cmap(x, alpha=alpha, bytes=bytes)
         # For floating-point greyscale images, we treat negative as
         # transparent so we copy that over to the alpha channel
-        if x.ndim == 2 and issubclass(x.dtype.type, np.floating):
+        if x.ndim == 2 and x.dtype.kind == 'f':
             rgba[:, :, 3] = np.where(x < 0.0, 0, rgba[:, :, 3])
         return rgba
 
diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
@@ -287,7 +287,7 @@ def _make_image(self, A, in_bbox, out_bbox, clip_bbox, magnification=1.0,
         if not unsampled:
             if len(A.shape) == 2:
                 A = self.norm(A)
-                if issubclass(A.dtype.type, np.floating):
+                if A.dtype.kind == 'f':
                     # For floating-point greyscale images, we treat negative
                     # numbers as transparent.
                     output = np.empty((out_height, out_width), dtype=A.dtype)
