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Wrong point capturing with box selection

Hi everyone!

My code is aimed to generate map where I can select areas via box select and get points of this selection in table. Mainly, I used code posted here:
Unfortunately, I get error “ValueError: Invalid property path ‘mapbox._derived’ for layout” and, what is a main headache, wrong points in the table. (I can select 3 points and get nothing or get a few wrong points.)

I’m a newbee, sorry if something wrong.


import plotly.graph_objs as go
import plotly.offline as py
import pandas as pd
import numpy as np
from ipywidgets import interactive, HBox, VBox
import as px

source = pd.read_csv(r"cities.csv", sep=";")

f = go.FigureWidget(px.scatter_mapbox(source, lat="lat", lon="lon", color="admin", hover_data=["population","capital"], zoom=3, height=300))
scatter =[0]

# Create a table FigureWidget that updates on selection from points in the scatter plot of f
t = go.FigureWidget([go.Table(
    header=dict(values=["population","capital", "city"],
                fill = dict(color='#C2D4FF'),
                align = ['left'] * 5),
    cells=dict(values=[source[col] for col in ["population","capital", "city"]],
               fill = dict(color='#F5F8FF'),
               align = ['left'] * 5))])

def selection_fn(trace,points,selector):[0].cells.values = [source.loc[points.point_inds][col] for col in ["population","capital", "city"]]


# Put everything together