Display a slider widget to select items from a list.
This also allows you to render a range slider by passing a two-element tuple or list as the value.
The difference between st.select_slider and st.slider is that select_slider accepts any datatype and takes an iterable set of options, while slider only accepts numerical or date/time data and takes a range as input.
| Function signature | |
|---|---|
st.select_slider(label, options=[], value=None, format_func=special_internal_function, key=None, help=None, on_change=None, args=None, kwargs=None, *, disabled=False) | |
| Parameters | |
label (str) | A short label explaining to the user what this slider is for. |
options (Sequence, numpy.ndarray, pandas.Series, pandas.DataFrame, or pandas.Index) | Labels for the slider options. All options will be cast to str internally by default. For pandas.DataFrame, the first column is selected. |
value (a supported type or a tuple/list of supported types or None) | The value of the slider when it first renders. If a tuple/list of two values is passed here, then a range slider with those lower and upper bounds is rendered. For example, if set to (1, 10) the slider will have a selectable range between 1 and 10. Defaults to first option. |
format_func (function) | Function to modify the display of the labels from the options. argument. It receives the option as an argument and its output will be cast to str. |
key (str or int) | An optional string or integer to use as the unique key for the widget. If this is omitted, a key will be generated for the widget based on its content. Multiple widgets of the same type may not share the same key. |
help (str) | An optional tooltip that gets displayed next to the select slider. |
on_change (callable) | An optional callback invoked when this select_slider's value changes. |
args (tuple) | An optional tuple of args to pass to the callback. |
kwargs (dict) | An optional dict of kwargs to pass to the callback. |
disabled (bool) | An optional boolean, which disables the select slider if set to True. The default is False. This argument can only be supplied by keyword. |
| Returns | |
(any value or tuple of any value) | The current value of the slider widget. The return type will match the data type of the value parameter. |
Examples
color = st.select_slider(
'Select a color of the rainbow',
options=['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'])
st.write('My favorite color is', color)
And here's an example of a range select slider:
start_color, end_color = st.select_slider(
'Select a range of color wavelength',
options=['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'],
value=('red', 'blue'))
st.write('You selected wavelengths between', start_color, 'and', end_color)
(view standalone Streamlit app)
Featured videos
Check out our video on how to use one of Streamlit's core functions, the select slider! 🎈
In the video below, we'll take it a step further and make a double-ended slider.