title: database migration using alembic or flask (Python)
body: <p>i am creating a database using SQLAlchemy and I Need to do Migration to my data as i am using df_sql function for converting my csv into dataframe and then to tables in sqlalchemy. As i do this i need to do Migration to add new column and values inside it and assign Primary and foreign key Features. I saw someting related to Alembic and flask but am not sure how to upgrade it as also am working on Jupyter. Any ideas of how i can update delete and assign keys to my tables would be very helpful. Done until the table creation. </p>
  
  <pre><code>metadata.tables.keys()
  
  dict_keys(['table1', 'table2'])
  </code></pre>
  
  <p>I also tried directly to create a temp table and copy ist values and assinging Primary key but am getting error with my column names as it has Special characters so i cant create duplicate too. Rename property too doesnt work</p>
  
  <pre><code>Column: date
  Column: time_stamp
  Column: timeslices[5].profilerDataProcess[8]_C0[us]
  Column: timeslices[4].profilerDataProcess[54]_C0[us]
  Column: timeslices[4]profilerDataProcess[50]_C0[us]
  Column: timeslices[4].profilerDataProcess[49]_C0[us]
  Column: timeslices[0].profilerDataProcess[14]_C0[us]
  </code></pre>