未挑選的對象與原始對象不匹配

Question

我的程序未能取消激發我的數據，其中pickle.load（f）與pickle.dump（object，f）不匹配。 我的問題是我在哪裏用下面的代碼去錯了，因爲我已經嘗試了各種 文件模式上面下面我的代碼列出的相應錯誤：

F =開放（家+「/.GMouseCfg」， 'AB +'）

出：它們是不同

F =開放（家+ '/.GMouseCfg','ab+'，編碼= 'UTF-8'）

ValueError異常：二進制模式並不需要的編碼參數

F =開放（家+ '/.GMouseCfg','a+'）

類型錯誤：必須海峽，而不是字節

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') 

我曾經做過的閱讀python文檔的泡菜和文件IO但我無法辨別很多，爲什麼有我原來的對象和拆封一個

之間的差異

Answer 1

酸洗和拆除後，顯然command和command2永遠不會是同一個對象。

這意味着commands == commands2總是會返回False，除非你實現comparision爲類，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 
    ...