Google App Engine有效内容对象 [英] Google App Engine Payload Object

问题描述

如何在python中的任务负载中发送类对象？我想在任务的参数中发送一个对象。

当我使用 simplejson 时，出现错误： Object不可序列化。

当我使用pickle时，得到 KeyValue Error 。

如何做这个 ？

How to send a class object in the payload of a task in python? I want to send an object in the parameters of a task.
When I use simplejson, I get the error: Object is not serializable.
When I use pickle, I get KeyValue Error.
How to do this ?

这是我要序列化的类

class Matrix2D_icfg:
name = ""
indices = []
value = {}
def __init__(self,s):
    self.name = s
    self.indices = []
def __getitem__(self,i):
    self.indices.append(i)
    if len(self.indices)==2:
        (m,n) = self.indices
        self.indices = []
        if self.value.has_key(m*4276+n) == True :
            value = self.value[m*4276+n]
        else :
            value = 0
        return value
    else: return self

def __setitem__(self,i,value):
    self.indices.append(i)      
    if len(self.indices)==2:
        (m,n) = self.indices
        if value != 0 : self.value[m*4276+n] = value
        self.indices = []
    return self

icfg = Matrix2D_icfg("icfg") #declaring object
icfg_compress = pickle.dumps(icfg) #to pickle

icfg = pickle.loads(icfg_compress) # to unload

当我将pickle对象作为有效载荷并将其卸载时，出现以下错误稍后

I get the following error when i pass the pickled object as payload and unload it later

File "/Users/praveensekar/myFYP/gaecode/pknots4d.2.3/pknots.py", line 439, in post
    icfg = pickle.loads(icfg_compress)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/pickle.py", line 1374, in loads
    return Unpickler(file).load()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/pickle.py", line 858, in load
    dispatch[key](self)
KeyError: '\x00'  

推荐答案

问题出在卸载的数据类型上。我铸造它键入str和一切似乎正常工作。
我只是将它改为

The problem was with the type of data that was unloaded. I casted it to type str and everything seemed to work properly. I just changed it to

icfg = Matrix2D_icfg("icfg") #declaring object
icfg_compress = pickle.dumps(icfg) #to pickle

icfg = pickle.loads(str(icfg_compress)) # to unload

这篇关于Google App Engine有效内容对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！