私はChacoライブラリを使用しています。インタラクティブなプロットを作成します。このプロットでは、chaco.tools.api RangeSelection を使用して、この一部を選択できます。さて、この長方形がどの位置にあるのか知りたいです。次のコードを使用すると、必要なことはすべて実行できますが、次のエラーが発生します。なぜですか?? エラーでは、I nedd へのポイントは selection_masks です
これはコードです:
# Major library imports
from numpy import arange
from scipy.special import jn
# Enthought library imports
from enable.api import Component, ComponentEditor
from traits.api import HasTraits, Instance, Any, on_trait_change
from traitsui.api import Item, Group, View
# Chaco imports
from chaco.api import create_line_plot, add_default_axes, add_default_grids
from chaco.tools.api import RangeSelection, RangeSelectionOverlay
# # Create the Chaco plot.
def _create_plot_component(self):
numpoints = 100
low = -5
high = 15.001
x = arange(low, high, (high-low)/numpoints)
# Plot a bessel function
y = jn(0, x)
plot = create_line_plot((x,y), color=(0,0,1,1), width=2.0, index_sort="ascending")
plot.active_tool = RangeSelection(plot, left_button_selects = True, auto_handle_event = False)
plot.overlays.append(RangeSelectionOverlay(component=plot))
plot.bgcolor = "white"
plot.padding = 50
add_default_grids(plot)
add_default_axes(plot)
self.times_ds = plot.index
self.times_ds.on_trait_change(self._selections_changed, 'metadata_changed')
return plot
# Attributes to use for the plot view.
size=(600,500)
title="Simple line plot"
class Demo(HasTraits):
times_ds = Any()
plot = Instance(Component)
corr_renderer = Any()
traits_view = View(
Group(
Item('plot', editor=ComponentEditor(size=size),
show_label=False),
orientation = "vertical"),
resizable=True, title=title,
width=size[0], height=size[1]
)
def _plot_default(self):
return _create_plot_component(self)
def _selections_changed(self, event):
selections = event["selections"]
low, high = selections
print low, high
demo = Demo()
if __name__ == "__main__":
demo.configure_traits()
そして、これはエラーの一部です(エラーでは、四角形のポイントが私がネッドしました)
Exception occurred in traits notification handler for object: <chaco.array_data_source.ArrayDataSource object at 0x66a94d0>, trait: metadata_changed, old value: <undefined>, new value: True
Traceback (most recent call last):
File "/home/franco/Python/Canopy/appdata/canopy-1.0.3.1262.rh5-x86_64/lib/python2.7/site-packages/traits/trait_notifiers.py", line 521, in rebind_call_1
self.dispatch( getattr( obj(), self.name ), new )
File "/home/franco/Python/Canopy/appdata/canopy-1.0.3.1262.rh5-x86_64/lib/python2.7/site-packages/traits/trait_notifiers.py", line 455, in dispatch
handler( *args )
File "/home/franco/Desktop/Proyecto/Codigo/analisis_mas_range_relections.py", line 59, in _selections_changed
selections = event["selections"]
TypeError: 'bool' object has no attribute '__getitem__'
Exception occurred in traits notification handler for object: <chaco.array_data_source.ArrayDataSource object at 0x66a94d0>, trait: metadata_changed, old value: <undefined>, new value: True
#the error continue but is the same error change the selection_masks....
TypeError: 'bool' object has no attribute '__getitem__'
Exception occurred in traits notification handler for object: <chaco.array_data_source.ArrayDataSource object at 0x6758290>, trait: metadata_changed, old value: <undefined>, new value: {'selection_masks': (-0.5953709619238516, 10.991581102204394)}
#the selection_masks are the point to I need
ありがとう