Streamlit 会话状态一次拉动所有内容导致重复小部件错误

Question

我不断收到错误： “DuplicateWidgetID：有多个小部件具有相同的 key='submit_answer'。”

我正在尝试遍历这些问题，但看起来它仍然同时拉动所有会话状态。然后抛出重复的小部件错误。

所以我很好奇应该对会话状态代码进行哪些更改，以便更好地迭代？或者开放寻求任何其他建议。我正在尝试创建一个是/否问题的游戏。你可以一次回答一个问题，它会告诉你你是对还是错。最后也给出总分。

import streamlit as st
import pandas as pd

def main():
    st.title('Employer Test') # Check if 'started' key exists in session_state, if not, display candidate information  
    
    if not st.session_state.get('started'):
        st.markdown('## Candidate Information') 
    
    # Full Name Input 
    full_name = st.text_input('Full Name') 
    
    # Experience Dropdown 
    experience = st.selectbox("Experience", [" Showcase"], index=0) 
    
    # Language Dropdown 
    language = st.selectbox("Type of Game", [" Game"], index=0) 
   
    # Button to start the test  
    
    if st.button('Submit'): 
        if full_name:
            st.session_state['started'] = True
            st.session_state['full_name'] = full_name
            run_python_test() 
    else: 
        run_python_test()


def run_python_test():
    
    st.title('Is the follow statement or question related to XYZ') 
    # Dummy test questions and answers 
    questions = [
        { 'question': 'Question 1',
          'options': ['Yes', 'No'], 
          'correct_answer': 'Yes' 
        },
        { 
          'question': 'Question 2', 
          'options': ['Yes', 'No'], 
          'correct_answer': 'No' 
        },
        { 
          'question': 'Question 3', 
          'options': ['Yes', 'No'], 
          'correct_answer': 'Yes' 
        } 
        # Add more questions here... 
    ]

    total_questions = len(questions) 
    if  'answer' not in st.session_state:
        st.session_state['answer'] = [''] * total_questions 
    for i, question_data in enumerate(questions):
        question = question_data['question']
        
        st.write(f'Question {i+1}: {question}') 
        
        # Display options for each question 
        st.session_state['answer'][i] = st.text_area(f"Enter answer for Question {i+1}", value=st.session_state['answer'][i], key=f"answer_{i}") 

        
        # Add a submit button  
        if st.button("Submit Test", key="submit_answer"):
            score = 0 
            # Process the answers and calculate score  
            for i, ans in enumerate(st.session_state['answer']): 
                if ans == questions[i]['correct_answer']:
                    score += 1
                st.write(f"Question {i+1} Answer: {ans}")
        
            percentage_score = (score / total_questions) * 100 
        
            if percentage_score >= 60:
                save_result(st.session_state['full_name'], percentage_score)
                st.session_state['test_completed'] = True

def save_result(full_name, score):
    data = {'Full Name':[full_name], 'Score':[score]}
    df = pd.DataFrame(data)
    df.to_csv('test_results.csv',index=False)
    st.write('Result saved')
    
                               
if __name__ == '__main__':
    main()     

Answer 1

Streamlit

st.session_state

的行为类似于字典，因此您只能将唯一标识符作为键。此外，使用显式键创建的每个小部件都会添加到状态中。

也就是说，您的问题是您正在为每个问题创建一个具有相同键的提交按钮。如果你想这样做，你需要为按钮提供唯一的标识符，就像：

for i, question_data in enumerate(questions):
    # ...
    if st.button("Submit Test", key=f"submit_answer_{i}"):
       # ...

否则，您可以重新配置您的应用程序以使用 st.form 和 st.form_submit_button。