|
|
"""Tests for pylab tools module.
|
|
|
"""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
|
|
|
from io import UnsupportedOperation, BytesIO
|
|
|
|
|
|
import matplotlib
|
|
|
matplotlib.use('Agg')
|
|
|
from matplotlib.figure import Figure
|
|
|
|
|
|
from nose import SkipTest
|
|
|
import nose.tools as nt
|
|
|
|
|
|
from matplotlib import pyplot as plt
|
|
|
import numpy as np
|
|
|
|
|
|
from IPython.core.getipython import get_ipython
|
|
|
from IPython.core.interactiveshell import InteractiveShell
|
|
|
from IPython.core.display import _PNG, _JPEG
|
|
|
from .. import pylabtools as pt
|
|
|
|
|
|
from IPython.testing import decorators as dec
|
|
|
|
|
|
|
|
|
def test_figure_to_svg():
|
|
|
# simple empty-figure test
|
|
|
fig = plt.figure()
|
|
|
nt.assert_equal(pt.print_figure(fig, 'svg'), None)
|
|
|
|
|
|
plt.close('all')
|
|
|
|
|
|
# simple check for at least svg-looking output
|
|
|
fig = plt.figure()
|
|
|
ax = fig.add_subplot(1,1,1)
|
|
|
ax.plot([1,2,3])
|
|
|
plt.draw()
|
|
|
svg = pt.print_figure(fig, 'svg')[:100].lower()
|
|
|
nt.assert_in(u'doctype svg', svg)
|
|
|
|
|
|
def _check_pil_jpeg_bytes():
|
|
|
"""Skip if PIL can't write JPEGs to BytesIO objects"""
|
|
|
# PIL's JPEG plugin can't write to BytesIO objects
|
|
|
# Pillow fixes this
|
|
|
from PIL import Image
|
|
|
buf = BytesIO()
|
|
|
img = Image.new("RGB", (4,4))
|
|
|
try:
|
|
|
img.save(buf, 'jpeg')
|
|
|
except Exception as e:
|
|
|
ename = e.__class__.__name__
|
|
|
raise SkipTest("PIL can't write JPEG to BytesIO: %s: %s" % (ename, e))
|
|
|
|
|
|
@dec.skip_without("PIL.Image")
|
|
|
def test_figure_to_jpeg():
|
|
|
_check_pil_jpeg_bytes()
|
|
|
# simple check for at least jpeg-looking output
|
|
|
fig = plt.figure()
|
|
|
ax = fig.add_subplot(1,1,1)
|
|
|
ax.plot([1,2,3])
|
|
|
plt.draw()
|
|
|
jpeg = pt.print_figure(fig, 'jpeg', quality=50)[:100].lower()
|
|
|
assert jpeg.startswith(_JPEG)
|
|
|
|
|
|
def test_retina_figure():
|
|
|
# simple empty-figure test
|
|
|
fig = plt.figure()
|
|
|
nt.assert_equal(pt.retina_figure(fig), None)
|
|
|
plt.close('all')
|
|
|
|
|
|
fig = plt.figure()
|
|
|
ax = fig.add_subplot(1,1,1)
|
|
|
ax.plot([1,2,3])
|
|
|
plt.draw()
|
|
|
png, md = pt.retina_figure(fig)
|
|
|
assert png.startswith(_PNG)
|
|
|
nt.assert_in('width', md)
|
|
|
nt.assert_in('height', md)
|
|
|
|
|
|
_fmt_mime_map = {
|
|
|
'png': 'image/png',
|
|
|
'jpeg': 'image/jpeg',
|
|
|
'pdf': 'application/pdf',
|
|
|
'retina': 'image/png',
|
|
|
'svg': 'image/svg+xml',
|
|
|
}
|
|
|
|
|
|
def test_select_figure_formats_str():
|
|
|
ip = get_ipython()
|
|
|
for fmt, active_mime in _fmt_mime_map.items():
|
|
|
pt.select_figure_formats(ip, fmt)
|
|
|
for mime, f in ip.display_formatter.formatters.items():
|
|
|
if mime == active_mime:
|
|
|
nt.assert_in(Figure, f)
|
|
|
else:
|
|
|
nt.assert_not_in(Figure, f)
|
|
|
|
|
|
def test_select_figure_formats_kwargs():
|
|
|
ip = get_ipython()
|
|
|
kwargs = dict(quality=10, bbox_inches='tight')
|
|
|
pt.select_figure_formats(ip, 'png', **kwargs)
|
|
|
formatter = ip.display_formatter.formatters['image/png']
|
|
|
f = formatter.lookup_by_type(Figure)
|
|
|
cell = f.__closure__[0].cell_contents
|
|
|
nt.assert_equal(cell, kwargs)
|
|
|
|
|
|
# check that the formatter doesn't raise
|
|
|
fig = plt.figure()
|
|
|
ax = fig.add_subplot(1,1,1)
|
|
|
ax.plot([1,2,3])
|
|
|
plt.draw()
|
|
|
formatter.enabled = True
|
|
|
png = formatter(fig)
|
|
|
assert png.startswith(_PNG)
|
|
|
|
|
|
def test_select_figure_formats_set():
|
|
|
ip = get_ipython()
|
|
|
for fmts in [
|
|
|
{'png', 'svg'},
|
|
|
['png'],
|
|
|
('jpeg', 'pdf', 'retina'),
|
|
|
{'svg'},
|
|
|
]:
|
|
|
active_mimes = {_fmt_mime_map[fmt] for fmt in fmts}
|
|
|
pt.select_figure_formats(ip, fmts)
|
|
|
for mime, f in ip.display_formatter.formatters.items():
|
|
|
if mime in active_mimes:
|
|
|
nt.assert_in(Figure, f)
|
|
|
else:
|
|
|
nt.assert_not_in(Figure, f)
|
|
|
|
|
|
def test_select_figure_formats_bad():
|
|
|
ip = get_ipython()
|
|
|
with nt.assert_raises(ValueError):
|
|
|
pt.select_figure_formats(ip, 'foo')
|
|
|
with nt.assert_raises(ValueError):
|
|
|
pt.select_figure_formats(ip, {'png', 'foo'})
|
|
|
with nt.assert_raises(ValueError):
|
|
|
pt.select_figure_formats(ip, ['retina', 'pdf', 'bar', 'bad'])
|
|
|
|
|
|
def test_import_pylab():
|
|
|
ns = {}
|
|
|
pt.import_pylab(ns, import_all=False)
|
|
|
nt.assert_true('plt' in ns)
|
|
|
nt.assert_equal(ns['np'], np)
|
|
|
|
|
|
class TestPylabSwitch(object):
|
|
|
class Shell(InteractiveShell):
|
|
|
def enable_gui(self, gui):
|
|
|
pass
|
|
|
|
|
|
def setup(self):
|
|
|
import matplotlib
|
|
|
def act_mpl(backend):
|
|
|
matplotlib.rcParams['backend'] = backend
|
|
|
|
|
|
# Save rcParams since they get modified
|
|
|
self._saved_rcParams = matplotlib.rcParams
|
|
|
self._saved_rcParamsOrig = matplotlib.rcParamsOrig
|
|
|
matplotlib.rcParams = dict(backend='Qt4Agg')
|
|
|
matplotlib.rcParamsOrig = dict(backend='Qt4Agg')
|
|
|
|
|
|
# Mock out functions
|
|
|
self._save_am = pt.activate_matplotlib
|
|
|
pt.activate_matplotlib = act_mpl
|
|
|
self._save_ip = pt.import_pylab
|
|
|
pt.import_pylab = lambda *a,**kw:None
|
|
|
self._save_cis = pt.configure_inline_support
|
|
|
pt.configure_inline_support = lambda *a,**kw:None
|
|
|
|
|
|
def teardown(self):
|
|
|
pt.activate_matplotlib = self._save_am
|
|
|
pt.import_pylab = self._save_ip
|
|
|
pt.configure_inline_support = self._save_cis
|
|
|
import matplotlib
|
|
|
matplotlib.rcParams = self._saved_rcParams
|
|
|
matplotlib.rcParamsOrig = self._saved_rcParamsOrig
|
|
|
|
|
|
def test_qt(self):
|
|
|
s = self.Shell()
|
|
|
gui, backend = s.enable_matplotlib(None)
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('qt')
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
gui, backend = s.enable_matplotlib()
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
def test_inline(self):
|
|
|
s = self.Shell()
|
|
|
gui, backend = s.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
nt.assert_equal(s.pylab_gui_select, None)
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
nt.assert_equal(s.pylab_gui_select, None)
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('qt')
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
def test_inline_twice(self):
|
|
|
"Using '%matplotlib inline' twice should not reset formatters"
|
|
|
|
|
|
ip = self.Shell()
|
|
|
gui, backend = ip.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
|
|
|
fmts = {'png'}
|
|
|
active_mimes = {_fmt_mime_map[fmt] for fmt in fmts}
|
|
|
pt.select_figure_formats(ip, fmts)
|
|
|
|
|
|
gui, backend = ip.enable_matplotlib('inline')
|
|
|
nt.assert_equal(gui, 'inline')
|
|
|
|
|
|
for mime, f in ip.display_formatter.formatters.items():
|
|
|
if mime in active_mimes:
|
|
|
nt.assert_in(Figure, f)
|
|
|
else:
|
|
|
nt.assert_not_in(Figure, f)
|
|
|
|
|
|
def test_qt_gtk(self):
|
|
|
s = self.Shell()
|
|
|
gui, backend = s.enable_matplotlib('qt')
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
gui, backend = s.enable_matplotlib('gtk')
|
|
|
nt.assert_equal(gui, 'qt')
|
|
|
nt.assert_equal(s.pylab_gui_select, 'qt')
|
|
|
|
|
|
|
|
|
def test_no_gui_backends():
|
|
|
for k in ['agg', 'svg', 'pdf', 'ps']:
|
|
|
assert k not in pt.backend2gui
|
|
|
|
