用python从mysql数据库导出数据存在csv（0.95s完成38000条数据导出）

import pymysql
import csv
import codecs


def get_conn():
    db = pymysql.connect(host="12xxx",port=3306,
                         user="root",password="1",
                         db="pydata201806",charset="utf-8")
    return db

def execute_all(cursor,sql,args):
    cursor.execute(sql,args)
    return cursor.fetchall()


def red_mysql_to_csv(filename):
    with codecs.open(filename=filename,mode='w',encoding='utf-8')as f:
        write = csv.writer(f,dialect='excel')
        write.writerow(['data','ss','yy','gg','ff','xx','ss','cc','da'])
        db = get_conn()
        cursor =db.cursor()
        sql ='select * from tb_csv'
        results = execute_all(cursor=cursor,sql=sql,args=None)
        for res in results:
            print(res)
            write.writerow(res)

if __name__ == '__main__':
    red_mysql_to_csv(r"E:\results4.csv")