st.radio(label, options, index=0, format_func=special_internal_function, key=None, help=None, on_change=None, args=None, kwargs=None, *, disabled=False, horizontal=False, label_visibility="visible")
A short label explaining to the user what this radio group is for. The label can optionally contain Markdown and supports the following elements: Bold, Italics, Strikethroughs, Inline Code, Emojis, and Links.
This also supports:
For accessibility reasons, you should never set an empty label (label="") but hide it with label_visibility if needed. In the future, we may disallow empty labels by raising an exception.
options (Sequence, numpy.ndarray, pandas.Series, pandas.DataFrame, or pandas.Index)
Labels for the radio options. This will be cast to str internally by default. For pandas.DataFrame, the first column is selected.
The index of the preselected option on first render.
Function to modify the display of radio options. It receives the raw option as an argument and should output the label to be shown for that option. This has no impact on the return value of the radio.
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.
An optional tooltip that gets displayed next to the radio.
An optional callback invoked when this radio's value changes.
An optional tuple of args to pass to the callback.
An optional dict of kwargs to pass to the callback.
An optional boolean, which disables the radio button if set to True. The default is False. This argument can only be supplied by keyword.
An optional boolean, which orients the radio group horizontally. The default is false (vertical buttons). This argument can only be supplied by keyword.
label_visibility ("visible" or "hidden" or "collapsed")
The visibility of the label. If "hidden", the label doesn't show but there is still empty space for it above the widget (equivalent to label=""). If "collapsed", both the label and the space are removed. Default is "visible". This argument can only be supplied by keyword.
The selected option.
import streamlit as st genre = st.radio( "What\'s your favorite movie genre", ('Comedy', 'Drama', 'Documentary')) if genre == 'Comedy': st.write('You selected comedy.') else: st.write("You didn\'t select comedy.")(view standalone Streamlit app)
Widgets can customize how to hide their labels with the
label_visibility parameter. If "hidden", the label doesn’t show but there is still empty space for it above the widget (equivalent to
label=""). If "collapsed", both the label and the space are removed. Default is "visible". Radio buttons can also be disabled with the
disabled parameter, and oriented horizontally with the
import streamlit as st # Store the initial value of widgets in session state if "visibility" not in st.session_state: st.session_state.visibility = "visible" st.session_state.disabled = False st.session_state.horizontal = False col1, col2 = st.columns(2) with col1: st.checkbox("Disable radio widget", key="disabled") st.checkbox("Orient radio options horizontally", key="horizontal") with col2: st.radio( "Set label visibility 👇", ["visible", "hidden", "collapsed"], key="visibility", label_visibility=st.session_state.visibility, disabled=st.session_state.disabled, horizontal=st.session_state.horizontal, )
Check out our video on how to use one of Streamlit's core functions, the radio button! 🔘