can't pickle instancemethod objects

[Steven D'Aprano]

On Sun, 09 Jul 2006 08:39:29 -0700, Jim Lewis wrote:

>> I'd suggest that "pop" could be your culprit. ...What is pop? A function or an instance method?
> 
> Neither. pop is an instance of a class, like:
> class X:
>    ...
> pop = X ()
> 
> pop surely is the culprit but it has arrays of objects, etc., and I
> don't know what to look for.

I'd start by looking for an attribute of pop that holds a reference to
some function or method. E.g. something like this:

class X():
    def method(self):
        pass
    def __init__(self):
        self.L = [1, "a", X.method] # note the lack of ()s

pop = X()

Otherwise, I'm working blind without knowing more about your class.

Here's a thought: comment out every attribute in your class, and then try
pickling it. If it succeeds, uncomment just *one* attribute, and try
pickling again. Repeat until pickling fails.


-- 
Steven.