初始渲染页面

main.py

@@ -1,22 +1,13 @@
 # streamlit_app.py
-
+import pandas as pd
 import streamlit as st
 
-# Create the SQL connection to pets_db as specified in your secrets file.
-conn = st.connection('data_db', type='sql')
+from bak.init_data import BatchDataRead
+from db_utils import BatchData, session
 
-# Insert some data with conn.session.
-with conn.session as s:
-    s.execute('CREATE TABLE IF NOT EXISTS pet_owners (person TEXT, pet TEXT);')
-    s.execute('DELETE FROM pet_owners;')
-    pet_owners = {'jerry': 'fish', 'barbara': 'cat', 'alex': 'puppy'}
-    for k in pet_owners:
-        s.execute(
-            'INSERT INTO pet_owners (person, pet) VALUES (:owner, :pet);',
-            params=dict(owner=k, pet=pet_owners[k])
-        )
-    s.commit()
-
-# Query and display the data you inserted
-pet_owners = conn.query('select * from pet_owners')
-st.dataframe(pet_owners)
+df = pd.DataFrame(
+    data=(BatchDataRead.from_orm(db_obj).dict()
+          for db_obj in session.query(BatchData).all())
+)
+#
+st.dataframe(df, use_container_width=True)