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import contextlib
from io import StringIO
import matplotlib as mpl
import matplotlib.pyplot as plt
import numpy as np
import pytest
from cycler import cycler
def test_colorcycle_basic():
fig, ax = plt.subplots()
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']))
for _ in range(4):
ax.plot(range(10), range(10))
assert [l.get_color() for l in ax.lines] == ['r', 'g', 'y', 'r']
def test_marker_cycle():
fig, ax = plt.subplots()
ax.set_prop_cycle(cycler('c', ['r', 'g', 'y']) +
cycler('marker', ['.', '*', 'x']))
for _ in range(4):
ax.plot(range(10), range(10))
assert [l.get_color() for l in ax.lines] == ['r', 'g', 'y', 'r']
assert [l.get_marker() for l in ax.lines] == ['.', '*', 'x', '.']
def test_marker_cycle_kwargs_arrays_iterators():
fig, ax = plt.subplots()
ax.set_prop_cycle(c=np.array(['r', 'g', 'y']),
marker=iter(['.', '*', 'x']))
for _ in range(4):
ax.plot(range(10), range(10))
assert [l.get_color() for l in ax.lines] == ['r', 'g', 'y', 'r']
assert [l.get_marker() for l in ax.lines] == ['.', '*', 'x', '.']
def test_linestylecycle_basic():
fig, ax = plt.subplots()
ax.set_prop_cycle(cycler('ls', ['-', '--', ':']))
for _ in range(4):
ax.plot(range(10), range(10))
assert [l.get_linestyle() for l in ax.lines] == ['-', '--', ':', '-']
def test_fillcycle_basic():
fig, ax = plt.subplots()
ax.set_prop_cycle(cycler('c', ['r', 'g', 'y']) +
cycler('hatch', ['xx', 'O', '|-']) +
cycler('linestyle', ['-', '--', ':']))
for _ in range(4):
ax.fill(range(10), range(10))
assert ([p.get_facecolor() for p in ax.patches]
== [mpl.colors.to_rgba(c) for c in ['r', 'g', 'y', 'r']])
assert [p.get_hatch() for p in ax.patches] == ['xx', 'O', '|-', 'xx']
assert [p.get_linestyle() for p in ax.patches] == ['-', '--', ':', '-']
def test_fillcycle_ignore():
fig, ax = plt.subplots()
ax.set_prop_cycle(cycler('color', ['r', 'g', 'y']) +
cycler('hatch', ['xx', 'O', '|-']) +
cycler('marker', ['.', '*', 'D']))
t = range(10)
# 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(t, t, 'r', hatch='xx')
# Allow the cycler to advance, but specify some properties
ax.fill(t, t, hatch='O')
ax.fill(t, t)
ax.fill(t, t)
assert ([p.get_facecolor() for p in ax.patches]
== [mpl.colors.to_rgba(c) for c in ['r', 'r', 'g', 'y']])
assert [p.get_hatch() for p in ax.patches] == ['xx', 'O', 'O', '|-']
def test_property_collision_plot():
fig, ax = plt.subplots()
ax.set_prop_cycle('linewidth', [2, 4])
t = range(10)
for c in range(1, 4):
ax.plot(t, t, lw=0.1)
ax.plot(t, t)
ax.plot(t, t)
assert [l.get_linewidth() for l in ax.lines] == [0.1, 0.1, 0.1, 2, 4]
def test_property_collision_fill():
fig, ax = plt.subplots()
ax.set_prop_cycle(linewidth=[2, 3, 4, 5, 6], facecolor='bgcmy')
t = range(10)
for c in range(1, 4):
ax.fill(t, t, lw=0.1)
ax.fill(t, t)
ax.fill(t, t)
assert ([p.get_facecolor() for p in ax.patches]
== [mpl.colors.to_rgba(c) for c in 'bgcmy'])
assert [p.get_linewidth() for p in ax.patches] == [0.1, 0.1, 0.1, 5, 6]
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('lw', (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('dashes', [[], [13, 2], [8, 3, 1, 3]])
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(['-', '--']))
def test_cycle_reset():
fig, ax = plt.subplots()
prop0 = StringIO()
prop1 = StringIO()
prop2 = StringIO()
with contextlib.redirect_stdout(prop0):
plt.getp(ax.plot([1, 2], label="label")[0])
ax.set_prop_cycle(linewidth=[10, 9, 4])
with contextlib.redirect_stdout(prop1):
plt.getp(ax.plot([1, 2], label="label")[0])
assert prop1.getvalue() != prop0.getvalue()
ax.set_prop_cycle(None)
with contextlib.redirect_stdout(prop2):
plt.getp(ax.plot([1, 2], label="label")[0])
assert prop2.getvalue() == prop0.getvalue()
def test_invalid_input_forms():
fig, ax = plt.subplots()
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle(1)
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle([1, 2])
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle('color', 'fish')
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle('linewidth', 1)
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle('linewidth', {1, 2})
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle(linewidth=1, color='r')
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle('foobar', [1, 2])
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle(foobar=[1, 2])
with pytest.raises((TypeError, ValueError)):
ax.set_prop_cycle(cycler(foobar=[1, 2]))
with pytest.raises(ValueError):
ax.set_prop_cycle(cycler(color='rgb', c='cmy'))
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