控制流

由 neevop 十二月 3, 2023

import streamlit as st

name = st.text_input('Name')
if not name:
  st.warning('Please input a name.')
  st.stop()
st.success('Thank you for inputting a name.')

# st.form(key, clear_on_submit=False)
import streamlit as st

with st.form("my_form"):
   st.write("Inside the form")
   slider_val = st.slider("Form slider")
   checkbox_val = st.checkbox("Form checkbox")

   # Every form must have a submit button.
   submitted = st.form_submit_button("Submit")  #  must contain
   if submitted:
       st.write("slider", slider_val, "checkbox", checkbox_val)

st.write("Outside the form")

# st.form_submit_button(label="Submit", help=None, on_click=None, args=None, kwargs=None, *, type="secondary", disabled=False, use_container_width=False) -> bool

import streamlit as st

if "value" not in st.session_state:
    st.session_state.value = "Title"

##### Option using st.rerun #####
st.header(st.session_state.value)

if st.button("Foo"):
    st.session_state.value = "Foo"
    st.rerun()