def render_snapshot(self):
"""
Method rendering and displaying a snasphot of the widget.
This can be useful to save a version of the widget that can actually
be seen in a static rendition of your notebook (when using nbconvert,
for instance, or when reading the notebook on GitHub).
Returns:
Ipython.display.HTML: the snasphot as a data url in an img tag.
"""
out = Output()
out.append_stdout(
"Rendering snapshot from widget (are you sure the widget is currently displayed?)..."
)
def on_update(change):
if change.new is None:
return
out.clear_output()
with out:
display(Image(url=change.new))
self.unobserve(on_update, "snapshot")
self.observe(on_update, "snapshot")
self.send({"msg": "render_snapshot"})
return out
def _cb(pts):
if pts_callback:
pts_callback(pts, rej, box)
else:
out = Output()
box.children = tuple(list(box.children) + [out])
out.append_stdout(pts)
def test_append_stdout():
output = Output()
# Try appending a message to stdout.
output.append_stdout("snakes!")
expected = (_make_stream_output("snakes!", "stdout"),)
assert output.outputs == expected, repr(output.outputs)
# Try appending a second message.
output.append_stdout("more snakes!")
expected += (_make_stream_output("more snakes!", "stdout"),)
assert output.outputs == expected, repr(output.outputs)
def test_append_stdout():
output = Output()
# Try appending a message to stdout.
output.append_stdout("snakes!")
expected = (_make_stream_output("snakes!", "stdout"), )
assert output.outputs == expected, repr(output.outputs)
# Try appending a second message.
output.append_stdout("more snakes!")
expected += (_make_stream_output("more snakes!", "stdout"), )
assert output.outputs == expected, repr(output.outputs)
