散景服务器图未通过下拉菜单选择进行更新

Question

我正在尝试使用Bokeh基于列表创建交互式绘图，列表中的每个元素都是一个DataFrame。我想通过下拉菜单选择需要绘制的df的顺序。

我有一个包含2个DataFrame的列表，如果我选择OPTION1，则要从列表中绘制第一个df。如果我选择OPTION2，我想从列表中绘制第二个df，两者的索引都是DateTimeIndex ........对不起，这是我第一次使用Bokeh。 默认情况下，绘图始终是第一次绘图，默认情况下始终会绘图，但是当我从下拉菜单中选择新的OPTION时，绘图不会更新。我们将不胜感激帮助确定我的错误。

编辑新的源代码

import pickle
# https://stackoverflow.com/questions/58250387/bokeh-server-plot-not-updating-with-drop-down-menu-selection
from numpy.random import random

from bokeh.models import DatetimeTickFormatter, Slider, RangeTool
from bokeh.models.layouts import WidgetBox, Column, Row
from bokeh.plotting import ColumnDataSource, Figure, output_file, show, output_notebook
from bokeh.models.widgets import Select, TextInput

from bokeh.io import curdoc
from bokeh.palettes import Spectral11, Blues9, Oranges9
from bokeh.layouts import layout, row, column
from bokeh.plotting import figure

machines_produccion = [['LPOT101', 'PREN101', 'LPOT102', 'OTRO103', 'OTRO102', 'LPOT103'],
 ['TAGU004', 'LPOT005', 'LPOT003', 'LPOT002', 'TAGU003', 'TAGU005', 'LASE001', 'TAGU001', 'LPOT004', 'LPOT001',
  'TAGU002']]
machines_aux = [['COAI109', 'COAI105', 'OTRO101', 'COAI108', 'COAI107', 'ALUM101', 'COAI104', 'COAI103', 'COAI106'],
 ['ALUM002', 'REFR001', 'COAI002', 'ALUM001', 'COAI001']]
LABELS_OPTION =  ['OPTION1', 'OPTION2']


def get_dataset(src, idx):
    df = src[idx].reset_index()
    df.index.name = 'level_0'
    return ColumnDataSource.from_df(data=df)


def make_plot(source, title):
    TOOLS = 'crosshair,save,pan,box_zoom,reset,wheel_zoom,tap,hover'
    plot = figure(plot_height=200, plot_width=600, title="NAIA4.0 PEAKS", toolbar_location=None, sizing_mode="scale_both",  tools=TOOLS)#, x_range=('2018-07-05','2018-07-10'))
    # plot = figure(x_axis_type="datetime", plot_width=800, tools="", toolbar_location=None)
    plot.title.text = title

    for machine, color in zip(machines_produccion[i], Spectral11):
        plot.line(x='level_0', y=machine, source=source, line_color=color, line_width=1, legend='_' + machine,alpha=0.1)

    for machine, color in zip(machines_aux[i], Spectral11):
        plot.line(x='level_0', y=machine, source=source, line_color=color, line_width=2, line_dash="4 4", legend='_'+machine,alpha=0.1)

    # fixed attributes
    plot.legend.location = "top_right"
    plot.legend.click_policy = "hide"
    plot.xaxis.axis_label = 'datetime'
    plot.xaxis[0].formatter = DatetimeTickFormatter()
    plot.yaxis.axis_label = 'value(kW)'

    return plot

def update_plot(attrname, old, new):
    option_val = option_select.value
    if option_val == 'OPTION1':
        i=0
    else:
        i=1
    plot.title.text = option_val

    src = get_dataset(dfs, i)
    source.data = src



i=0

option_select = Select(title="OPTIONS", value="OPTION1", options=LABELS_OPTION)

path_pickle = '../repo/processed/dfs_.pickle'
with open(path_pickle, 'rb') as f:
    dfs = pickle.load(f)
df1 = dfs[i].reset_index()
df1.index.name = 'level_0'
source  = ColumnDataSource(data = df1)
plot = make_plot(source, "TITLE")

option_select.on_change('value', update_plot)

controls = [option_select]
inputs = column(*controls, width=320, height=1000)
inputs.sizing_mode = 'fixed'
l = layout(row(inputs, plot), sizing_mode="scale_both")

curdoc().add_root(l)

在下拉菜单上选择时，我无法更新绘图。我打印“ select_option”，但情节没有更新。