Question

我正在尝试使用cPickle在远程环境中加载该函数。但我得到了错误“'模块'对象没有属性...”。我真正卡住的地方是命名空间已经包含该属性，即使它无法加载请帮忙

import inspect
import cPickle as pickle
from run import run


def get_source(func): 
 sourcelines = inspect.getsourcelines(func)[0]
 sourcelines[0] = sourcelines[0].lstrip()
 return "".join(sourcelines)

def fun(f):
 return f()

def fun1():
 return 10 

funcs = (fun, fun1) 

sources = [get_source(func) for func in funcs]

funcs_serialized = pickle.dumps((fun.func_name,sources),0)

args_serialized = pickle.dumps(fun1,0) 

#Creating the Environment where fun & fun1 doesnot exist 
del globals()['fun']
del globals()['fun1']

r = run() 

r.work(funcs_serialized,args_serialized)

这是run.py

import cPickle as pickle

class run():
 def __init__(self):
  pass

 def work(self,funcs_serialized,args_serialized):

  func, fsources = pickle.loads(funcs_serialized)

  fobjs = [compile(fsource, '<string>', 'exec') for fsource in fsources]

    #After eval fun and fun1 should be there in globals/locals
  for fobj in fobjs:
   try: 
    eval(fobj)
    globals().update(locals())
   except:
    pass

  print "Fun1 in Globals: ",globals()['fun1']   
  print "Fun1 in locals: ",locals()['fun1']   
  arg = pickle.loads(args_serialized)

错误是

Fun1 in Globals:  <function fun1 at 0xb7dae6f4>
Fun1 in locals:  <function fun1 at 0xb7dae6f4>
Traceback (most recent call last):
  File "fun.py", line 32, in <module>
    r.work(funcs_serialized,args_serialized) 
  File "/home/guest/kathi/python/workspace/run.py", line 23, in work
    arg = pickle.loads(args_serialized)
AttributeError: 'module' object has no attribute 'fun1'

Answer 1

我发现此链接有用： http://stefaanlippens.net/python-pickling-and-dealing-with-attributeerror-module-object-has-no-attribute-thing.html

它提供了两种解决方案。更好的解决方案是添加到加载模块的头部（或__main__）：

from myclassmodule import MyClass

但我认为应该有更好的解决方案。

Answer 2

来自http://docs.python.org/library/pickle.html#what-can-be-pickled-and-unpickled：

注意功能（内置和用户定义的）被“完全腌制” 合格的“名称参考，而不是值。这意味着只有功能名称与腌制一起使用函数的模块名称无论是功能还是功能代码，也没有任何功能属性被腌制。就这样定义模块必须可导入破坏环境，和模块必须包含命名对象，否则将引发例外。

您在定义fun1的模块中删除了对fun1的引用，因此错误。

Answer 3

当你正在loads fun1寻找__main__中的{{1}}时，或者它最初是

时，该函数的模块名称会保存到pickle中

Answer 4

尝试添加

from your_first_module import fun,fun1

进入run.py

AttributeError：'module'对象没有属性（使用cPickle时）

4 个答案: