A_1.table
A_2.table
A_3.table

IP1, IP2, IP3.

username=x
password=pw
port=1234

def proc(db, hostname):
    con = mysql.connector.connect(user=x, password=pw,
                          host=hostname,
                          database=db, port=1234)
     db_cursor = con.cursor()
     db_cursor.execute('SELECT * FROM table')
     table_rows = db_cursor.fetchall()
     df = pd.DataFrame(table_rows)
     print(df.head(1))
con.close()

a=map(proc, tablelist, hostlist)