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Issue #8299, implemented copy, added test #8375

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Merged
merged 3 commits into from
May 25, 2017
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Issue #8299, implemented copy, added test #8375

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981f273
Issue #8299, implemented copy, added test
vidursatija Mar 24, 2017
90f5f15
Removed _lut from docs, changed to snake_case
vidursatija Mar 25, 2017
1579364
Issue #8375 and #8299 fixed
vidursatija May 14, 2017
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10 changes: 10 additions & 0 deletions lib/matplotlib/colors.py
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Original file line number Diff line number Diff line change
Expand Up @@ -530,6 +530,16 @@ def __call__(self, X, alpha=None, bytes=False):
rgba = tuple(rgba[0, :])
return rgba

def __copy__(self):
"""Create new object with the same class, update attributes
"""
cls = self.__class__
cmapobject = cls.__new__(cls)
cmapobject.__dict__.update(self.__dict__)
if self._isinit:
cmapobject._lut = np.copy(self._lut)
return cmapobject

def set_bad(self, color='k', alpha=None):
"""Set color to be used for masked values.
"""
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13 changes: 13 additions & 0 deletions lib/matplotlib/tests/test_colors.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
from __future__ import (absolute_import, division, print_function,
unicode_literals)

import copy
import six
import itertools
import warnings
Expand Down Expand Up @@ -44,6 +45,18 @@ def test_resample():
assert_array_almost_equal(lc3([0, 0.5, 1]), expected)


def test_colormap_copy():
cm = plt.cm.Reds
cm_copy = copy.copy(cm)
with np.errstate(invalid='ignore'):
ret1 = cm_copy([-1, 0, .5, 1, np.nan, np.inf])
cm2 = copy.copy(cm_copy)
cm2.set_bad('g')
with np.errstate(invalid='ignore'):
ret2 = cm_copy([-1, 0, .5, 1, np.nan, np.inf])
assert_array_equal(ret1, ret2)


def test_colormap_endian():
"""
Github issue #1005: a bug in putmask caused erroneous
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