import pymysql

SQL = """
SELECT TABLE_NAME, COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE,
       IFNULL(CAST(COLUMN_DEFAULT AS CHAR),'<NULL>') AS dflt
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = %s AND TABLE_NAME IN ('charge_orders','charge_records','download_tasks','energy_stats')
ORDER BY TABLE_NAME, ORDINAL_POSITION
"""

for db in ("pms_dev", "pms"):
    c = pymysql.connect(host="10.8.0.252", user="root", password="Hbhyg731024@", database=db)
    cur = c.cursor()
    cur.execute(SQL, (db,))
    print("==", db)
    for r in cur.fetchall():
        print("  %-16s %-18s %-14s null=%-4s default=%s" % r)
    c.close()