Sqlalchemy复合唯一约束创建两个单独的索引？

from sqlalchemy import create_engine, Column, Integer, String, UniqueConstraint
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class MyTable(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    column1 = Column(String)
    column2 = Column(String)
    
    __table_args__ = (
        UniqueConstraint('column1', name='uq_column1'),
        UniqueConstraint('column2', name='uq_column2')
    )

# 创建数据库引擎和表
engine = create_engine('数据库连接字符串')
Base.metadata.create_all(engine)