Question

我正在解决一个类项目，我遇到了这个问题（当我向数组追加一个新对象时，似乎所有元素都指向同一个对象）这是我的代码

import os
from Process import Process

processes = []

# Read the file
file = open("file.txt","r")
# Read the lines
for line in file.readlines() :
    # split the line components
    process = line.split(";")
    global processes
    # append a new element to the array
    pr = Process(process[0], process[1], "Ready")
    # find how many elements in the line to loop through
    process_len = len(process)
    # loop through the line elements
    for element in range(2,process_len) :
        #  if it's a CPU
        if process[element].find("CPU") == 0:
            s = process[element].split(":")
            pr.add_cpu(s[1])
        #  if it's an IO
        elif process[element].find("IO") == 0:
            s = process[element].split(":")
            pr.add_io(s[1])
    #     End of elif
    processes.append(pr)
file.close()
print "-------------------------- \n";
for p in processes :
    print p.getcpu()

这是我正在阅读的文件：

1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35;IO:5;CPU:1
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;
1;500;CPU:20;IO:5;CPU:10;IO:15;CPU:30;IO:11;CPU:35
1;500;CPU:20;IO:5;CPU:10;IO:15;

这是输出：

-------------------------- 

['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
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['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
['20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10', '20', '10', '30', '35', '1\n', '20', '10', '30', '20', '10', '30', '35\n', '20', '10']
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Process finished with exit code 0

我认为问题在于我创建了对同一个对象的新引用，并且我不断将它们作为新对象添加到数组中，但我不知道如何确定是否是这种情况或我错了，如果是这样的话，我怎么能解决这个问题呢？

编辑：这是流程类：

class Process :

    pid = 0;
    pat = 0;
    wt  = 0;
    global ion;
    ion = 0;
    global cpun;
    cpun = 0;
    global pState;
    pState = "Ready";
    global pNature;
    pNature = "I\O bound";
    global turnAroundTime;
    turnAroundTime = 0;
    global cpu;
    cpu = []
    global io;
    io  = []

    # constructor
    def __init__(self,id,at,state) :
        pid = id;
        pat = at;
        pState = state;

    # define the process nature
    @staticmethod
    def nature() :
        global pNature;
        global ion;
        global cpun;
        if ion > cpun :
            pNature = "I\O bound";
        else :
            pNature = "CPU bound";

    # add new cpu
    @staticmethod
    def add_cpu(cp) :
       cpu.append(cp);
       global cpun;

       cpun = cpun + int(cp);

    # add new io
    @staticmethod
    def add_io(i) :
       io.append(i);
       global ion;
       ion = ion + int(i);

     # get the cpu array size
    @staticmethod
    def get_cpu_size() :
        return len(cpu);

        # get the IO array size
    @staticmethod
    def get_io_size() :
        return len(io)

    # returns the cpu array
    @staticmethod
    def getcpu():
        return cpu

Answer 1

类过程的变量对于pr的每个实例都是共同的。所以你每次都在粉碎价值观。

import os

processes = []

class Process():
    # constructor
    def __init__(self, id, at, state):
        self.pid = id
        self.pat = at
        self.pState = state
        self.wt = 0
        self.ion = 0
        self.cpun = 0
        self.pNature = "I\O bound"
        self.turnAroundTime = 0
        self.cpu = []
        self.io = []

    # define the process nature
    def nature(self):
        if self.ion > self.cpun:
            self.pNature = "I\O bound"
        else:
            self.pNature = "CPU bound"

    # add new cpu
    def add_cpu(self, cp):
        self.cpu.append(cp)
        self.cpun = self.cpun + int(cp)

    # add new io
    def add_io(self, i):
        self.io.append(i)
        self.ion = self.ion + int(i)

    # get the cpu array size
    def get_cpu_size(self):
        return len(self.cpu)

    # get the IO array size
    def get_io_size(self):
        return len(self.io)

    # returns the cpu array
    def getcpu(self):
        return self.cpu


# Read the file
file = open("file.txt", "r")
# Read the lines
for line in file.readlines():
    # split the line components
    process = line.split(";")
    # append a new element to the array
    pr = Process(process[0], process[1], "Ready")
    # find how many elements in the line to loop through
    process_len = len(process)
    # loop through the line elements
    for element in range(2, process_len):
        #  if it's a CPU
        if process[element].find("CPU") == 0:
            s = process[element].split(":")
            pr.add_cpu(s[1])
        #  if it's an IO
        elif process[element].find("IO") == 0:
            s = process[element].split(":")
            pr.add_io(s[1])
    #     End of elif
    processes.append(pr)
file.close()
print("-------------------------- \n")
for p in processes:
    print(p.getcpu())

PS：不要在Python中使用; 。并尝试使用Pep8。这是一个蟒蛇风格的指南。

数组元素无缘无故地指向同一个对象

1 个答案: