获取具有前3个计数的列的表的列名

import pymysql

# 连接到MySQL数据库
conn = pymysql.connect(host='localhost', user='username', password='password', database='database_name')
cursor = conn.cursor()

# 执行查询语句
cursor.execute("SHOW COLUMNS FROM table_name")

# 获取查询结果
result = cursor.fetchall()

# 提取前3个列名
column_names = [row[0] for row in result[:3]]

# 打印列名
for column_name in column_names:
    print(column_name)

# 关闭数据库连接
cursor.close()
conn.close()