Update app.py

app.py

@@ -13,6 +13,9 @@ from langchain import OpenAI
 from langchain import PromptTemplate
 from loguru import logger
 
+# must be called as the first Streamlit command in the script
+st.set_page_config(page_title="Talk2Book", page_icon="📖")
+
 # ns = SimpleNamespace(counter=0)
 os.environ["OPENAI_API_KEY"] == st.secrets["OPENAI_API_KEY"]
 open_api_key = os.getenv('OPENAI_API_KEY', '')
@@ -21,8 +24,6 @@ logger.debug(f" open_api_key: [{open_api_key}]")
 # delete os .environ
 del os.environ['OPENAI_API_KEY']
 
-st.set_page_config(page_title="Talk2Book", page_icon="📖")
-
 #### sidebar section 1 ####
 with st.sidebar:
     book = st.radio("Choose a book: ",