how to pickle a lambda?

[Alejandro Dubrovsky]

On Mon, 29 Apr 2002 08:09:14 +1000, Erik Max Francis wrote:

> Alejandro Dubrovsky wrote:
> 
>> i've got a class that defines something like the following:
>> 
>> def t(self,a,b):
>>         ...
>> 
>> def h(self):
>>         self.thelambdafunctiontobepickled = lambda x: self.t(x,4)
>> 
>> is there any simple way of pickling that lambda function above so that
>> when i unpickle it will be set to the right function?
> 
> You can't pickle a lambda function.  However, you could for instance
> pickle a string representation of it that when eval'd gives the desired
> lambda.
 
yes, but that means saving the definition as a string everytime that the
lambda is changed.  i was looking for something "neater". eg for function
variables, i can just save and restore the variables'.__name__ attribute.
i was wondering if there was something similar for lambdas.
Thanks,
Alejandro