我正在使用Streamlit构建一个基于答案的表单，构建另一个表单，我如何隐藏表单，使它们不堆栈？

Question

我正在用流光建造表单。我使用session_state来控制要出现的问题的哪个部分。这是第1节，但有超过10节，不是所有的部分都会被问到，这是基于你如何填写最后一节。

    if 'section' not in st.session_state:
      st.session_state['section'] = 'section 1'

    if st.session_state['section'] == 'section 1':
      with st.form(key='Scoresheet', clear_on_submit=False):
        st.markdown("""
          ### ScoreSheet
          Repeatable sheet for Grading tech tickets
          """)
        tech_name = st.text_input("Tech Name")
        date = st.date_input("Date")
        ticket_number = st.text_input("Ticket Number")
        phone_availability = st.radio("Phone Availability (Weekly)",['<10','20','30','40','50','60','70','80','90','100','N/A Leads // Special Project'])
        outage = st.radio("Large Outage",['TSP','Large Outage','Protedcted Sonet','Protected Wave','Point to Point SONET','Point to Point Wave'])
        next1 = st.form_submit_button(label='Next')

      if next1:
        st.session_state['Data1'] = {'tech_name': tech_name, 'date': date, 'ticket_number': ticket_number, 'phone_availability': phone_availability, 'outage': outage}
        if outage in ['TSP']:
          st.session_state['section'] = 'section 2'
        elif outage in ['Large Outage']:
          st.session_state['section'] = 'section 3'
        elif outage in ['Protedcted Sonet','Protected Wave']:
          st.session_state['section'] = 'section 4'
        elif outage in ['Point to Point SONET','Point to Point Wave']:
          st.session_state['section'] = 'section 5'

当您单击submit时，它会将下一节的表单呈现在现有窗体之下。每个部分都会发生这种情况，除非您单击问题单的菜单项，在该菜单项中只使用当前部分重新构建页面。

我想要它清除前一节，只是显示当前的部分。

Answer 1

为表单使用占位符，一旦提交空它。

placeholder = st.empty()

with placeholder.form(key=str(num)):
    ...

    if st.form_submit_button():
        placeholder.empty()

检查this。

Answer 2

提示:使用st.session_state保存数据

代码示例

import streamlit as st 
from datetime import datetime

def my_callback():
    print(f"curdate: {datetime.now()} first: {st.session_state.value1} sec: {st.session_state.value2}")

with st.form('my_form',clear_on_submit=True):
    st.radio(label='‍♀️ part1:', options=[
                        '解决', '未解决', '未完全解决'], horizontal=True,
                        key='value1')

    error_list = ['答非所问', '推荐错误', '推荐不准确', '回答不详细', '信息更新不及时']
    not_saf_reason = st.radio(
        label='‍♀️ part2:', options=error_list, horizontal=True,key='value2')

    submit_button = st.form_submit_button(
                    label=' 点我提交', on_click=my_callback
                    )

st.session_state

• save

• 将part1保存到value1，这是st.session_state

part2到value2中的变量，这是st.session_state

• write中的变量，是从st.session_state

获取value1和value2的回调函数。