python脚本批量生成50000条插入数据的sql语句

f = open("xx.txt",'w')
for i in range(1,50001):
    str_i = str(i)
    realname = "lxs"+str_i
    phone = 13678101715 + i
    email = "lxs" + str_i +"@126.com"
    sql = 'insert into table_a (realname,phone,email,sign,event_id) values ("'+realname+'",' +str(phone)+ ',"'+email+'",0,1);'
    f.write(sql)
    f.write("\n")
print('50000 success!')
f.close()