app.py

def main():
    st.title("🤗 Streamlit App with Secrets")
    st.write("This application demonstrates how to access secret API keys securely on Hugging Face Spaces.")

    # Accessing secrets
    # On Hugging Face Spaces, go to 'Settings' > 'Variables and secrets' to add your key.
    # In Streamlit, these are accessible via st.secrets
    
    SECRET_KEY_NAME = "MY_NEW_SECRET"

    try:
        # Check if the key exists in secrets
        if SECRET_KEY_NAME in st.secrets:
            api_key = st.secrets[MY_NEW_SECRET]
            
            st.success(f"Successfully loaded secret: `{SECRET_KEY_NAME}`")
            
            # Display a masked version of the key for verification (NEVER print the full key in a real app)
            masked_key = f"{api_key[:4]}{'*' * (len(api_key) - 4)}" if len(api_key) > 4 else "****"
            st.code(f"Key Value: {masked_key}", language="text")
            
            st.info("You can now use this variable `api_key` to make authenticated requests.")
            
        else:
            st.warning(f"Secret `{MY_NEW_SECRET}` not found.")
            st.markdown("""
            **How to fix:**
            1. Go to your Hugging Face Space **Settings**.
            2. Scroll to **Variables and secrets**.
            3. Click **New secret**.
            4. Name: `MY_API_KEY`.
            5. Value: *Your actual API key*.
            """)
            
    except FileNotFoundError:
        # This handles local development if .streamlit/secrets.toml is missing
        st.error("Secrets configuration not found.")
        st.markdown("If running locally, ensure you have a `.streamlit/secrets.toml` file.")

if __name__ == "__main__":
    main()