cx_Oracle:如何获取ORA-xxxxx错误号？

import cx_Oracle

dsn = cx_Oracle.makedsn('host', 'port', service_name='service_name')
conn = cx_Oracle.connect(user='username', password='password', dsn=dsn)

cursor = conn.cursor()

try:
    cursor.execute('SELECT * FROM table_name')
    rows = cursor.fetchall()
except cx_Oracle.DatabaseError as e:
    error_code = e.args[0].code
    print(f"Error code: {error_code}")

import cx_Oracle

dsn = cx_Oracle.makedsn('host', 'port', service_name='service_name')
conn = cx_Oracle.connect(user='username', password='password', dsn=dsn)

cursor = conn.cursor()

try:
    cursor.execute('INSERT INTO table_name (column1, column2) VALUES (value1, value2)')
    conn.commit()
except cx_Oracle.DatabaseError as e:
    error_code = e.args[0].code
    print(f"Error code: {error_code}")