Mapbox token usage

đź“Š Plotly Python
1

In Plotly express graphics demo there is a section named Maps, when I try the first code block;’:

import plotly.express as px
** px.set_mapbox_access_token(open(".mapbox_token").read())**
** carshare = px.data.carshare()**
** fig = px.scatter_mapbox(carshare, lat=“centroid_lat”, lon=“centroid_lon”, color=“peak_hour”, size=“car_hours”,**
** color_continuous_scale=px.colors.cyclical.IceFire, size_max=15, zoom=10)**
** fig.show()**

I get the follow error:

FileNotFoundError Traceback (most recent call last)
in
** 1 import plotly.express as px**
----> 2 px.set_mapbox_access_token(open(".mapbox_token").read())
** 3 carshare = px.data.carshare()**