Question

我的程序无法解开我的数据，其中pickle.load（f）与pickle.dump（object，f）不匹配。我的问题是我在下面的代码中出错了，因为我已经尝试过各种各样的代码我的代码上面列出了相应错误的文件模式：

f = open（主页+＆＃39; /。GMouseCfg＆＃39;，＆＃39; ab +＆＃39;）

out：他们是不同的

f = open（主页+＆＃39; /。GMouseCfg＆＃39;，＆＃39; ab +＆＃39;，encoding =＆＃39; utf-8＆＃39;）

ValueError：二进制模式没有采用编码参数

f = open（主页+＆＃39; /。GMouseCfg＆＃39;，＆＃39; a +＆＃39;）

TypeError：必须是str，而不是字节

import abc, pprint
from evdev import ecodes as e
from os.path import expanduser

try:
    import cPickle as pickle
except:
    import pickle


class Command(object):
    __metaclass__ = abc.ABCMeta

    @abc.abstractmethod
    def set(self, data):
        """set data used by individual commands"""
        return

    @abc.abstractmethod
    def run(self):
        """implement own method of executing data of said command"""
        return

class KeyCommand(Command):
    def __init__(self, data):
        self.data = data
    def set(data):
        self.data = data
    def run(self):
        pass
    def __str__(self):
        return data

class SystemCommand(Command):
    def __init__(self, data):
        self.data = data
    def set(data):
        self.data = data
    def run(self):
        pass
    def __str__(self):
        return data

if __name__ == '__main__':
    ids = [2,3,4,5,6,7,8,9,10,11,12]
    home = expanduser('~')
    f = open(home + '/.GMouseCfg','a+')
    f.seek(0)

    commands = list()
    commands.append(KeyCommand({3:[e.KEY_RIGHTCTRL,e.KEY_P]}))
    commands.append(SystemCommand({5:['gedit','./helloworld.txt']}))
    pickle.dump(commands,f)
    f.seek(0)
    commands2 = pickle.load(f)
    if commands == commands2:
        print('They are the same')
    else:
        print('They are different')

我已经在python docs上做了很多关于pickle和file io的阅读，但是我无法辨别为什么我的原始对象和unpickled之间存在差异

Answer 1

在酸洗和去除斑点后，显然command和command2永远不会是同一个对象。

这意味着commands == commands2将始终返回False，除非您为您的班级实施comparision，例如：

class KeyCommand(Command):
    ...
    def __eq__(self, other):
        return self.data == other.data
    def __ne__(self, other):
        return self.data != other.data
    ...

class SystemCommand(Command):
    ...
    def __eq__(self, other):
        return self.data == other.data
    def __ne__(self, other):
        return self.data != other.data
    ...

未挑选的对象与原始对象不匹配

1 个答案: