Summary

plotly choropleth figure not displayed properly.

Steps to reproduce

import streamlit as st
import plotly.express as px

df = px.data.election()
geojson = px.data.election_geojson()

fig = px.choropleth(df, geojson=geojson, color="Bergeron",
                    locations="district", featureidkey="properties.district",
                    projection="mercator"
                   )
fig.update_geos(fitbounds="locations", visible=False)
fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
st.plotly_chart(fig)

Expected behavior:

Actual behavior:

Is this a regression?

not sure

Debug info

• Streamlit version: Streamlit, version 0.56.0
• Python version: Python 3.6.2 :: Continuum Analytics, Inc. (in win10), python 3.7 (in docker container with base image python:3.7)
• Using Conda? PipEnv? PyEnv? Pex?
• OS version: win 10, docker on CentOS Linux release 7.6.1810 (Core)
• Browser version: Google Chrome 79.0.3945.130 (64bit), Firefox 72.0.2 (64 bit)

Additional information

If needed, add any other context about the problem here. For example, did this bug come from https://discuss.streamlit.io or another site? Link the original source here!