python – 来自工具的Bokeh服务器回调
作者:互联网
我是Python的新手,目前正在使用Bokeh进行交互式绘图可视化,我需要显示多个相关图表.为了实现这一点,我正在使用散景服务器.
我一直在阅读文档和some examples,但我一直无法找到由绘图上的选择触发的python回调(在服务器中执行)的示例.基本上我想做的是:
from bokeh.plotting import figure, curdoc
from bokeh.layouts import column
from bokeh.models import ColumnDataSource
TOOLS = "tap"
p = figure(title="Some Figure", tools=TOOLS)
source = ColumnDataSource(dict(x=[[1, 3, 2], [3, 4, 6, 6]], y=[[2, 1, 4], [4, 7, 8, 5]], name=['A', 'B']))
p.patches('x', 'y', source=source, color=["firebrick", "navy"], alpha=[0.8, 0.3], line_width=2)
def callback():
print("TapTool callback executed on Patch {}")
??? <- some code here linking the taptool with the callback function defined above
curdoc().add_root(column(p))
然后在执行服务器并单击补丁时:
2017-02-14 16:32:00,000 TapTool callback executed on Patch A
这种行为可以用散景来实现吗?
解决方法:
从项目维护人员编辑.
围绕选择导致1.0的一些混乱和回归.对于任何1.0版本,对于大多数用例,您现在想要在所选的’indices’属性上使用回调:
source.selected.on_change('indices', callback)
这种用法现在在集成测试下持续严格地维护,并且应该用于任何1.0 Bokeh版本.
所选事件可以链接到更新功能,如下所示:
from bokeh.plotting import figure, curdoc
from bokeh.layouts import column
from bokeh.models import ColumnDataSource
TOOLS = "tap"
p = figure(title="Some Figure", tools=TOOLS)
source = ColumnDataSource(dict(x=[[1, 3, 2], [3, 4, 6, 6]],
y=[[2, 1, 4], [4, 7, 8, 5]], name=['A', 'B']))
pglyph = p.patches('x', 'y', source=source, color=["firebrick", "navy"],
alpha=[0.8, 0.3], line_width=2)
def callback(attr, old, new):
# The index of the selected glyph is : new['1d']['indices'][0]
patch_name = source.data['name'][new['1d']['indices'][0]]
print("TapTool callback executed on Patch {}".format(patch_name))
pglyph.data_source.on_change('selected',callback)
curdoc().add_root(column(p))
更新更新的Bokeh版本.测试版本0.12.16
由于@Karel Marik提到字形不能同时混合直接值赋值和ColumnDataSource.所以前面的代码不起作用.这是仅使用源的更新,其中还包括用于打印多个选项的代码(使用shift单击制作):
from bokeh.plotting import figure, curdoc
from bokeh.layouts import column
from bokeh.models import ColumnDataSource
TOOLS = ["tap"]
p = figure(title="Some Figure", tools=TOOLS)
source = ColumnDataSource(dict(
x=[[1, 3, 2], [3, 4, 6, 6]],
y=[[2, 1, 4], [4, 7, 8, 5]],
name=['A', 'B'],color=["firebrick", "navy"],
alpha=[0.8,0.3],line_width=[3,3]))
pglyph = p.patches('x', 'y', color="color", alpha="alpha",
line_width="line_width", source=source)
def callback(attr, old, new):
# The index of the selected glyph is : new['1d']['indices'][0]
selections = new['1d']['indices']
print("Number of selections:{}".format(len(selections)))
for index in selections:
patch_name = source.data['name'][index]
print("TapTool callback executed on Patch {}".format(patch_name))
pglyph.data_source.on_change('selected',callback)
curdoc().add_root(column(p))
标签:python,python-3-x,callback,bokeh 来源: https://codeday.me/bug/20191006/1858015.html