DuplicateWidgetID: How to generate a key in this specific case?

🎈 Using Streamlit
1

Here are my functions:

def unit_select():
  unit_select.unit = st.selectbox('Select unit for force', ('lbs', 'klbs', 'tons'))

def unit_convert(df):
    if unit_select.unit == 'tons':
        df['A'] = df['B'].apply(some_conversion_func)  
    elif unit_select.unit == 'klbs':
        df['A'] = df['B'].apply(some_other_conversion_func)
    else:
        pass
    return df

if option == 'Unit Conversion Panel':
    unit_select()
    unit_confirm = st.button('Confirm')
    if unit_confirm:
        df = upload_my_df()  # I am loading my df using upload_my_df func which is not shown here
        unit_convert(df)

I am getting an error ’ DuplicateWidgetID: There are multiple identical st.selectbox widgets with the same generated key.’ because I am referring to the same function unit_select multiple time in the func unit_convert while checking for its value. Not sure how I can add the key attribute to the st.selectbox in this particular scenario.

2

After defining the undefined names your code runs for me without any DuplicateWidgetID errors. Probably they are defined differently in your actual code and that is where the issue lies.

3

Unfortunately, I am still getting the same error:
DuplicateWidgetID : There are multiple identical st.selectbox widgets with the same generated key.
It comes up at the very last line of code.

4

I would recommend changing your code to something like this:

def unit_select(key):
  unit_select.unit = st.selectbox('Select unit for force', ('lbs', 'klbs', 'tons'), key=key)

And then passing a unique key whenever you call unit_select()

5

noted, thanks @blackary

6

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