diff --git a/lib/matplotlib/cm.py b/lib/matplotlib/cm.py
index dbd050f9b3d6..0df436ab6d04 100644
--- a/lib/matplotlib/cm.py
+++ b/lib/matplotlib/cm.py
@@ -10,7 +10,6 @@
import six
import os
-import warnings as _warnings # To remove once spectral is removed
import numpy as np
from numpy import ma
import matplotlib as mpl
@@ -69,7 +68,8 @@ def _generate_cmap(name, lutsize):
"""Generates the requested cmap from its *name*. The lut size is
*lutsize*."""
- spec = datad[name]
+ # Use superclass method to avoid deprecation warnings during initial load.
+ spec = dict.__getitem__(datad, name)
# Generate the colormap object.
if 'red' in spec:
@@ -81,22 +81,18 @@ def _generate_cmap(name, lutsize):
LUTSIZE = mpl.rcParams['image.lut']
-# We silence warnings here to avoid raising the deprecation warning for
-# spectral/spectral_r when this module is imported.
-with _warnings.catch_warnings():
- _warnings.simplefilter("ignore")
- # Generate the reversed specifications ...
- for cmapname in list(six.iterkeys(datad)):
- spec = datad[cmapname]
- spec_reversed = _reverse_cmap_spec(spec)
- datad[cmapname + '_r'] = spec_reversed
-
- # Precache the cmaps with ``lutsize = LUTSIZE`` ...
-
- # Use datad.keys() to also add the reversed ones added in the section
- # above:
- for cmapname in six.iterkeys(datad):
- cmap_d[cmapname] = _generate_cmap(cmapname, LUTSIZE)
+# Generate the reversed specifications ...
+for cmapname in list(six.iterkeys(datad)):
+ spec = datad[cmapname]
+ spec_reversed = _reverse_cmap_spec(spec)
+ datad[cmapname + '_r'] = spec_reversed
+
+# Precache the cmaps with ``lutsize = LUTSIZE`` ...
+
+# Use datad.keys() to also add the reversed ones added in the section
+# above:
+for cmapname in six.iterkeys(datad):
+ cmap_d[cmapname] = _generate_cmap(cmapname, LUTSIZE)
cmap_d.update(cmaps_listed)
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