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Dropbox / app.py

Create app.py

3f79c23 about 2 years ago

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1.17 kB

	import streamlit as st

	# query params exist
	try:
	options = ['cat', 'dog', 'mouse', 'bat', 'duck']

	query_params = st.experimental_get_query_params()
	query_option = query_params['option'][0] #throws an exception when visiting http://host:port

	option_selected = st.sidebar.selectbox('Pick option',
	options,
	index=options.index(query_option))
	if option_selected:
	st.experimental_set_query_params(option=option_selected)

	# run when query params don't exist. e.g on first launch
	except: # catch exception and set query param to predefined value
	options = ['cat', 'dog', 'mouse', 'bat', 'duck']
	st.experimental_set_query_params(option=options[1]) # defaults to dog

	query_params = st.experimental_get_query_params()
	query_option = query_params['option'][0]

	option_selected = st.sidebar.selectbox('Pick option',
	options,
	index=options.index(query_option))
	if option_selected:
	st.experimental_set_query_params(option=option_selected)