/usr/lib/python3/dist-packages/matplotlib/tests/test_cycles.py is in python3-matplotlib 1.5.1-1ubuntu1.
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from matplotlib.testing.decorators import image_comparison, cleanup
import matplotlib.pyplot as plt
import numpy as np
from nose.tools import assert_raises
from cycler import cycler
@image_comparison(baseline_images=['color_cycle_basic'], remove_text=True,
extensions=['png'])
def test_colorcycle_basic():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']))
xs = np.arange(10)
ys = 0.25 * xs + 2
ax.plot(xs, ys, label='red', lw=4)
ys = 0.45 * xs + 3
ax.plot(xs, ys, label='green', lw=4)
ys = 0.65 * xs + 4
ax.plot(xs, ys, label='yellow', lw=4)
ys = 0.85 * xs + 5
ax.plot(xs, ys, label='red2', lw=4)
ax.legend(loc='upper left')
@image_comparison(baseline_images=['marker_cycle', 'marker_cycle'],
remove_text=True, extensions=['png'])
def test_marker_cycle():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']) +
cycler('marker', ['.', '*', 'x']))
xs = np.arange(10)
ys = 0.25 * xs + 2
ax.plot(xs, ys, label='red dot', lw=4, ms=16)
ys = 0.45 * xs + 3
ax.plot(xs, ys, label='green star', lw=4, ms=16)
ys = 0.65 * xs + 4
ax.plot(xs, ys, label='yellow x', lw=4, ms=16)
ys = 0.85 * xs + 5
ax.plot(xs, ys, label='red2 dot', lw=4, ms=16)
ax.legend(loc='upper left')
fig = plt.figure()
ax = fig.add_subplot(111)
# Test keyword arguments, numpy arrays, and generic iterators
ax.set_prop_cycle(color=np.array(['r', 'g', 'y']),
marker=iter(['.', '*', 'x']))
xs = np.arange(10)
ys = 0.25 * xs + 2
ax.plot(xs, ys, label='red dot', lw=4, ms=16)
ys = 0.45 * xs + 3
ax.plot(xs, ys, label='green star', lw=4, ms=16)
ys = 0.65 * xs + 4
ax.plot(xs, ys, label='yellow x', lw=4, ms=16)
ys = 0.85 * xs + 5
ax.plot(xs, ys, label='red2 dot', lw=4, ms=16)
ax.legend(loc='upper left')
@image_comparison(baseline_images=['lineprop_cycle_basic'], remove_text=True,
extensions=['png'])
def test_linestylecycle_basic():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_prop_cycle(cycler('linestyle', ['-', '--', ':']))
xs = np.arange(10)
ys = 0.25 * xs + 2
ax.plot(xs, ys, label='solid', lw=4)
ys = 0.45 * xs + 3
ax.plot(xs, ys, label='dashed', lw=4)
ys = 0.65 * xs + 4
ax.plot(xs, ys, label='dotted', lw=4)
ys = 0.85 * xs + 5
ax.plot(xs, ys, label='solid2', lw=4)
ax.legend(loc='upper left')
@image_comparison(baseline_images=['fill_cycle_basic'], remove_text=True,
extensions=['png'])
def test_fillcycle_basic():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']) +
cycler('hatch', ['xx', 'O', '|-']) +
cycler('linestyle', ['-', '--', ':']))
xs = np.arange(10)
ys = 0.25 * xs**.5 + 2
ax.fill(xs, ys, label='red, xx', linewidth=3)
ys = 0.45 * xs**.5 + 3
ax.fill(xs, ys, label='green, circle', linewidth=3)
ys = 0.65 * xs**.5 + 4
ax.fill(xs, ys, label='yellow, cross', linewidth=3)
ys = 0.85 * xs**.5 + 5
ax.fill(xs, ys, label='red2, xx', linewidth=3)
ax.legend(loc='upper left')
@image_comparison(baseline_images=['fill_cycle_ignore'], remove_text=True,
extensions=['png'])
def test_fillcycle_ignore():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']) +
cycler('hatch', ['xx', 'O', '|-']) +
cycler('marker', ['.', '*', 'D']))
xs = np.arange(10)
ys = 0.25 * xs**.5 + 2
# Should not advance the cycler, even though there is an
# unspecified property in the cycler "marker".
# "marker" is not a Polygon property, and should be ignored.
ax.fill(xs, ys, 'r', hatch='xx', label='red, xx')
ys = 0.45 * xs**.5 + 3
# Allow the cycler to advance, but specify some properties
ax.fill(xs, ys, hatch='O', label='red, circle')
ys = 0.65 * xs**.5 + 4
ax.fill(xs, ys, label='green, circle')
ys = 0.85 * xs**.5 + 5
ax.fill(xs, ys, label='yellow, cross')
ax.legend(loc='upper left')
@cleanup
def test_valid_input_forms():
fig, ax = plt.subplots()
# These should not raise an error.
ax.set_prop_cycle(None)
ax.set_prop_cycle(cycler('linewidth', [1, 2]))
ax.set_prop_cycle('color', 'rgywkbcm')
ax.set_prop_cycle('linewidth', (1, 2))
ax.set_prop_cycle('linewidth', [1, 2])
ax.set_prop_cycle('linewidth', iter([1, 2]))
ax.set_prop_cycle('linewidth', np.array([1, 2]))
ax.set_prop_cycle('color', np.array([[1, 0, 0],
[0, 1, 0],
[0, 0, 1]]))
ax.set_prop_cycle(lw=[1, 2], color=['k', 'w'], ls=['-', '--'])
ax.set_prop_cycle(lw=np.array([1, 2]),
color=np.array(['k', 'w']),
ls=np.array(['-', '--']))
assert True
@cleanup
def test_cycle_reset():
fig, ax = plt.subplots()
# Can't really test a reset because only a cycle object is stored
# but we can test the first item of the cycle.
prop = next(ax._get_lines.prop_cycler)
ax.set_prop_cycle(linewidth=[10, 9, 4])
assert prop != next(ax._get_lines.prop_cycler)
ax.set_prop_cycle(None)
got = next(ax._get_lines.prop_cycler)
assert prop == got, "expected %s, got %s" % (prop, got)
fig, ax = plt.subplots()
# Need to double-check the old set/get_color_cycle(), too
with warnings.catch_warnings():
prop = next(ax._get_lines.prop_cycler)
ax.set_color_cycle(['c', 'm', 'y', 'k'])
assert prop != next(ax._get_lines.prop_cycler)
ax.set_color_cycle(None)
got = next(ax._get_lines.prop_cycler)
assert prop == got, "expected %s, got %s" % (prop, got)
@cleanup
def test_invalid_input_forms():
fig, ax = plt.subplots()
assert_raises((TypeError, ValueError), ax.set_prop_cycle, 1)
assert_raises((TypeError, ValueError), ax.set_prop_cycle, [1, 2])
assert_raises((TypeError, ValueError), ax.set_prop_cycle, 'color', 'fish')
assert_raises((TypeError, ValueError), ax.set_prop_cycle, 'linewidth', 1)
assert_raises((TypeError, ValueError), ax.set_prop_cycle,
'linewidth', {'1': 1, '2': 2})
assert_raises((TypeError, ValueError), ax.set_prop_cycle,
linewidth=1, color='r')
if __name__ == '__main__':
import nose
nose.runmodule(argv=['-s', '--with-doctest'], exit=False)
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