没有得到python中的排序列表

Question

我有一个过程对象列表(用户定义),我想要排序,以便一次获得内存最密集的进程.

但是对排序进行反向排序并不会产生所需的结果.

我的代码:

import psutil as pu
import time

class proc:

    def __init__(self,pid,pname,pmem):
        self.pid = pid
        self.pname = pname
        self.pmem = int(pmem)

    # def __lt__(self,other):
    #   return self.pmem<other.pmem

    # def __repr__(self):
    #   return str(self.pmem)+"\t"+self.pname

if __name__ == "__main__":

    meg = 1024*1024
    gig = meg*1024

    while True:
        print(pu.cpu_count())
        print(pu.cpu_percent())
        print("{:.3f} GB".format(pu.virtual_memory().used/gig))
        x = []
        for p in pu.pids():
            pro = pu.Process(pid=p)
            # print(pro.memory_info()[0])
            # print(pro.memory_info()[1])
            x.append(proc(pid=p,pname=pro.name(),pmem=pro.memory_info()[0]))

        sorted(x,key=lambda x:x.pmem,reverse=True)

        for i in x:
            print(str(i.pmem)+'\t'+i.pname)

        time.sleep(5)

输出:

http://pastebin.com/7Pz5Yn7A

Answer 1

您应该使用sort而不是sorted:

x.sort(key=lambda item: item.pmem, reverse=True)

sort对现有清单进行排序; sorted创造一个新的.