IMO it would be much more efficient to use pandas for reading data from your MySQL server:
from sqlalchemy import create_engine
import pandas as pd
db_connection_str="mysql+pymysql://mysql_user:mysql_password@mysql_host/mysql_db"
db_connection = create_engine(db_connection_str)
df = pd.read_sql('SELECT * FROM table_name', con=db_connection)
this should also take care of column names…