Selectbox does not show the selected value

Using Streamlit
1

I am using selectboxes to filter data. When data is selected I want the remaining content of the selectboxes to be reduced. This results in the selected value not being shown in the selectbox after selecting a value.

Here is my code:

filtered_contracts = filtered_data["CONTRACT"].unique()
filtered_operators = filtered_data["OPERATOR"].unique()
incl_dimensions, excl_dimensions = st.columns((2, 2))
with incl_dimensions:
    st.selectbox(options=filtered_contracts, key='pick-CONTRACT', index=None)
    st.selectbox(options=filtered_operators, key='pick-OPERATOR', index=None)

Is this a bug?

Tried fixing it with the following code:

filtered_contracts = filtered_data["CONTRACT"].unique()
filtered_operators = filtered_data["OPERATOR"].unique()
incl_dimensions, excl_dimensions = st.columns((2, 2))
with incl_dimensions:
    st.selectbox(options=filtered_contracts, key='pick-CONTRACT', index=(0 if len(filtered_contracts) == 1 else None))
    st.selectbox(options=filtered_operators, key='pick-OPERATOR', index=(0 if len(filtered_operators) == 1 else None))

The fix somehow worked, but the “Clear values” x-mark disappeared. Making the filtering a one way street to no data being shown at all :smiley:

2

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3

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