def display(self, format="png"):
"""
Return an object that can be used to display this sequence.
This is used for IPython Notebook.
:param format: "png" or "svg"
"""
from sebastian.core.transforms import lilypond
seq = HSeq(self) | lilypond()
if format == "png":
suffix = ".preview.png"
args = ["lilypond", "--png", "-dno-print-pages", "-dpreview"]
elif format == "svg":
suffix = ".preview.svg"
args = ["lilypond", "-dbackend=svg", "-dno-print-pages", "-dpreview"]
f = tempfile.NamedTemporaryFile(suffix=suffix)
basename = f.name[:-len(suffix)]
args.extend(["-o"+basename, "-"])
p = sp.Popen(args, stdin=sp.PIPE)
p.communicate(write_lilypond.output(seq))
if p.returncode != 0:
# there was an error
return None
if not ipython:
return f.read()
if format == "png":
return Image(data=f.read(), filename=f.name, format="png")
else:
return SVG(data=f.read(), filename=f.name)
def display(self, format="png"):
"""
Return an object that can be used to display this sequence.
This is used for IPython Notebook.
:param format: "png" or "svg"
"""
from sebastian.core.transforms import lilypond
seq = HSeq(self) | lilypond()
if format == "png":
suffix = ".preview.png"
args = ["lilypond", "--png", "-dno-print-pages", "-dpreview"]
elif format == "svg":
suffix = ".preview.svg"
args = ["lilypond", "-dbackend=svg", "-dno-print-pages", "-dpreview"]
f = tempfile.NamedTemporaryFile(suffix=suffix)
basename = f.name[:-len(suffix)]
args.extend(["-o"+basename, "-"])
#Pass shell=True so that if your $PATH contains ~ it will
#get expanded. This also changes the way the arguments get
#passed in. To work correctly, pass them as a string
p = sp.Popen(" ".join(args), stdin=sp.PIPE, shell=True)
stdout, stderr = p.communicate(write_lilypond.output(seq))
if p.returncode != 0:
# there was an error
#raise IOError("Lilypond execution failed: %s%s" % (stdout, stderr))
return None
if not ipython:
return f.read()
if format == "png":
return Image(data=f.read(), filename=f.name, format="png")
else:
return SVG(data=f.read(), filename=f.name)
def test_output(self):
pitches = HSeq({"pitch": n} for n in [-2, 0, 2, -3])
seq = pitches | add({"octave": 5, DURATION_64: 16}) | lilypond()
self.assertEqual(output(seq), "{ c'4 d'4 e'4 f'4 }")
def test_output(self):
pitches = HSeq({"pitch": n} for n in [-2, 0, 2, -3])
seq = pitches | add({"octave": 5, DURATION_64: 16}) | lilypond()
self.assertEqual(output(seq), "{ c'4 d'4 e'4 f'4 }")