批量删除table,只保留最近几天的table

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#!/usr/bin/python3
"""
批量删除table,只保留最近几天的table
"""
import  pymysql
import  redef conn_(host='',usr='',passwd='',db='',port=3306,):conn = pymysql.connect(host, usr, passwd, db, port,charset='utf8')return  conndef del_table(conn_,table_pre='',table_suff='%Y%m%d',keep_count=3):date_form = None
    if table_suff == "%Y%m%d":date_form = "_(\d{4}\d{1,2}\d{1,2})$"
        date_len = 8
    elif table_suff == "%Y-%m-%d":date_form = "_(\d{4}-\d{1,2}-\d{1,2})$"
        date_len = 10
    elif table_suff == "%Y%m":date_form = "_(\d{4}\d{1,2})$"
        date_len = 6
    elif table_suff == "%Y-%m":date_form = "_(\d{4}-\d{1,2})$"
        date_len = 7
    else:raise Exception("暂时不支持其他类型的时间后缀")curs = conn_.cursor()curs.execute('SHOW TABLES')data = curs.fetchall()table_ = r'%s'%table_pre+date_formlist_table = []i = 0
    for table in data:mt = re.search(table_, table[0])if mt:if len(mt.groups()[0]) == date_len:list_table.append((table[0], mt.groups()[0]))i += 1
    sorted(list_table, key=lambda date: date[1]) #按照表结构后缀时间升序排序

    for j in range(i-keep_count):sql = 'DROP TABLE if exists %s'%list_table[j][0]curs.execute(sql)curs.close()conn_.close()if __name__ == '__main__':table_pre = "tree_product"
    table_suff = "%Y%m%d"
    # table_suff = "%Y-%m-%d"
    # table_suff = "%Y%m"
    # table_suff = "%Y-%m"
    conn=conn_('10.0.0.11','root','sctele@root','sxf',port=3306)del_table(conn,table_pre=table_pre,table_suff=table_suff,keep_count=1)

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