Python -正在尝试将字典插入postgres数据库，请参见keyerror

import psycopg2

# 定义数据库连接参数
db_params = {
    'host': 'localhost',
    'port': '5432',
    'database': 'your_database',
    'user': 'your_username',
    'password': 'your_password'
}

# 定义要插入的字典
data = {
    'column1': 'value1',
    'column2': 'value2',
    'column3': 'value3'
}

try:
    # 建立数据库连接
    conn = psycopg2.connect(**db_params)
    cursor = conn.cursor()

    # 构造插入语句
    insert_query = "INSERT INTO your_table (column1, column2, column3) VALUES (%s, %s, %s)"

    # 执行插入操作
    cursor.execute(insert_query, (data['column1'], data['column2'], data['column3']))
    conn.commit()

    # 关闭数据库连接
    cursor.close()
    conn.close()

    print("插入成功")

except KeyError as e:
    print("KeyError: 键名 '{0}' 不存在于字典中".format(e))
except psycopg2.Error as e:
    print("数据库错误：", e)