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私はプロットを埋め込むようにしています。私はx軸とy軸の選択のためのSelectウィジェットを持っています。プロットはy軸を変更したときに期待どおりに更新されます（図1）。しかし、x軸を変更することは私に問題をもたらしています。 x軸オプションを変更すると、新しい折れ線グラフが古いグラフの上に重ねられます（図2）。ページをリフレッシュするときだけ、グラフは期待通りにレンダリングされます（図3）。ページ全体をリフレッシュせずにプロットを更新するにはどうすればよいですか？Bokeh：コールバック時に、新しいプロットが古いプロットの上にオーバーレイされます
これは私がしようとしています何の実施例である：
import io
import pandas as pd
from bokeh.plotting import figure
from bokeh.layouts import row, column
from bokeh.models import ColumnDataSource, Range1d
from bokeh.models.widgets import Select
from bokeh.client import push_session
from bokeh.document import Document
from bokeh.embed import server_session
document = Document()
session = push_session(document)
trip_data = [{"trip": '1', "totalDistanceTravelled": "4.66", "totalTimeTaken": "765083", "time": "1504189219256",
"carRegNo": "ABC123", "driverName": "Anne"},
{"trip": '2', "totalDistanceTravelled": "14.63", "totalTimeTaken": "1282369", "time": "1504189219256",
"carRegNo": "DEF345", "driverName": "Harry"},
{"trip": '3', "totalDistanceTravelled": "3.66", "totalTimeTaken": "602713", "time": "1504189219256",
"carRegNo": "XYZ890", "driverName": "Ron"},
{"trip": '4', "totalDistanceTravelled": "7.11", "totalTimeTaken": "2234282", "time": "1504189219256",
"carRegNo": "ABC123", "driverName": "Anne"},
{"trip": '5', "totalDistanceTravelled": "14.14", "totalTimeTaken": "1282369", "time": "1504189219256",
"carRegNo": "DEF345", "driverName": "Harry"},
{"trip": '6', "totalDistanceTravelled": "4.33", "totalTimeTaken": "748446", "time": "1504189219256",
"carRegNo": "DEF345", "driverName": "Harry"},
{"trip": '7', "totalDistanceTravelled": "10.66", "totalTimeTaken": "960362", "time": "1504189219256",
"carRegNo": "XYZ890", "driverName": "Ron"}]
df = pd.DataFrame(trip_data)
drivers = df['driverName'].str.strip()
vehicles = df['carRegNo'].str.strip()
time_stamp = df['time'].astype(float)
total_distance_travelled = df['totalDistanceTravelled'].astype(float)
df['totalTimeTaken'] = df['totalTimeTaken'].astype(float)
df['totalTimeTaken'] /= 1000 * 3600
# Create Input controls
x_axis = Select(title="X Axis", options=sorted(["Drivers", "Vehicle Reg. Number"]), value="Drivers")
y_axis = Select(title="Y Axis", options=sorted(["Distance Travelled (kms)", "Time Taken (hours)"]),
value="Time Taken (hours)")
source = ColumnDataSource(data=dict(x=[], y=[]))
p = figure(x_range=[], y_range=Range1d(), plot_height=600, plot_width=700, title="")
def update():
print "UPDATE"
col_key_values = {
"Time Taken (hours)": 'totalTimeTaken',
"Distance Travelled (kms)": 'totalDistanceTravelled'
}
x_map = {
"Drivers": drivers,
"Vehicle Reg. Number": vehicles
}
x_name = x_map[x_axis.value]
x_y_values = {}
for x in x_name.unique():
x_y_values[x] = round(df.loc[x_name == x, col_key_values[y_axis.value]].astype(float).sum(), 2)
source.data = dict(
x=list(x_y_values.keys()),
y=list(x_y_values.values())
)
p.y_range.start = min(x_y_values.values())-1
p.y_range.end = max(x_y_values.values())+1
p.xaxis.axis_label = x_axis.value
p.yaxis.axis_label = y_axis.value
p.x_range.factors = list(x_y_values.keys())
p.line(x="x", y="y", source=source)
print source.data
return p
def on_x_change(attr, old, new):
global x_axis
x_axis.value = new
update()
def on_y_change(attr, old, new):
global y_axis
y_axis.value = new
update()
def create_layout():
print 'CREATE LAYOUT'
x_axis.on_change('value', on_x_change)
y_axis.on_change('value', on_y_change)
controls = column(children=[x_axis, y_axis])
layout = column(children=[controls, update()])
return layout
layout = create_layout()
html = u"""
<html>
<head></head>
<body>
%s
</body>
</html>
""" % server_session(layout, session_id=session.id, relative_urls=False)
with io.open("sample.html", mode='w+', encoding='utf-8') as f:
f.write(html)
print(__doc__)
document.add_root(layout)
if __name__ == "__main__":
print("\npress ctrl-C to exit")
session.loop_until_closed()
添付ファイル： 
