Pickling error when trying to save (Solved)

[Code Monkey]

Saving works sometimes, but sometimes I get the following error:

Code: Select all

I'm sorry, but an uncaught exception occurred.

While running game code:
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed

-- Full Traceback ------------------------------------------------------------

Full traceback:
  File "C:\Program Files\Renpy-6.13.12\renpy\execution.py", line 265, in run
  File "C:\Program Files\Renpy-6.13.12\renpy\ast.py", line 632, in execute
  File "C:\Program Files\Renpy-6.13.12\renpy\python.py", line 972, in py_exec_bytecode
  File "common/00library.rpy", line 625, in <module>
  File "C:\Program Files\Renpy-6.13.12\renpy\ui.py", line 237, in interact
  File "C:\Program Files\Renpy-6.13.12\renpy\display\core.py", line 1803, in interact
  File "C:\Program Files\Renpy-6.13.12\renpy\display\core.py", line 2329, in interact_core
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 714, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 714, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 714, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\screen.py", line 300, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 714, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 174, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 174, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 714, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\layout.py", line 174, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\behavior.py", line 627, in event
  File "C:\Program Files\Renpy-6.13.12\renpy\display\behavior.py", line 211, in run
  File "common/00screen.rpy", line 1146, in __call__
  File "C:\Program Files\Renpy-6.13.12\renpy\loadsave.py", line 220, in save
  File "C:\Program Files\Renpy-6.13.12\renpy\loadsave.py", line 47, in dump
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed

Windows-7-6.1.7601-SP1
Ren'Py 6.13.12.1728

Has anyone gotten this when saving before? I'm not entirely sure what I did to cause it. Any ideas or suggestions on how to fix it would be very much appreciated!

[Alex]

Try

Code: Select all

init python:
    config.use_cpickle = False

to get better error message.
The problem might be that you have a variable named exactly as function (for example - "say"). If so, just rename this variable.

[Code Monkey]

I did as you said and I did get a better error message. It points to a callback function and I renamed it but it still gives the same error. Perhaps some code would help. The callback function is defined in a class like so:

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@staticmethod
def transform_callback(d, st, at, **kwargs):
        for k, v in kwargs.iteritems():
                setattr(d, k, v)
        return 0

And then in some other method in the same class I call it. It gets curried, passed to a Transform, and that gets passed to the at_list param of renpy.show

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renpy.show('image_name', at_list=[Transform(function=renpy.curry(ImageDisplayHelper.transform_callback)(xpos=x_pos, ypos=y_pos, zoom=zoom_rate)), dissolve_in], layer=layer)

Hmm, what could it be? Have anymore suggestions?

[PyTom]

You probaably want to do:

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def transform_callback_(...):
    ...
transform_callback = staticmethod(transform_callback_)

I'm not 100% sure that will work. You may have to use a function instead of a staticmethod. Basically, pickling requires python be able to find the function from it's name. Certainly @staticmethod interferes - but simply being a static member of a class might also be problematic.

[Code Monkey]

Couldn't get that to work, so I removed the staticmethod and just made it a function and it works! Thanks a lot PyTom!

[woahevil1]

Alright this gaming is looking great! A few problems though:

1. When your health is zero, it continues the game until you kill the enemy instead of taking you to the losers screen.


2. After the battle is finished, this error occurs when I try to save a game:
- I'm sorry, but an uncaught exception occurred.

While running game code:
File "renpy/common/00gamemenu.rpy", line 161, in script
$ ui.interact()
File "renpy/common/00gamemenu.rpy", line 161, in <module>
$ ui.interact()
File "renpy/common/00action_file.rpy", line 277, in __call__
renpy.save(fn, extra_info=save_name)
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed

Any idea how to help?

[Mutive]

I seem to be having a similar problem following a while loop that I've created as a battle simulator. I can save before it, but not after I've run the battle (which takes place using a while loop). Do I need to change the loop to a function? (...argh...) Is there another way to handle it that would be easier? Thanks! I'm hitting my head against the wall trying to figure out why I can save only *before* while loops (and not after...)

(I've tried simplifying the while loop - written in Renpy vs. Python script - down to its bare bones in a dummy page and it's still not saving. So I think it's that, not some other bit of code (i.e. adding persistent states or whatever.) Will keep fiddling with it, but figure that if anyone has any ideas, I'm all ears! It would be good to get this bug taken care of!!!)

(Note: I also tried a for loop instead of a while, just to see if that was the issue, and the problem is persisting. Yargh!)

[Mutive]

Anyway, wanted to follow up to note that I've gotten it to work!

The problem appeared to be that I imported the random module to help with the battles I was creating. I was using the command:

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$ import random

which caused the game to glitch.

Instead I used the command:

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init python:
import random

at the top of the game, which then ran smoothly! So learned my lesson re: importing Python modules!

[Ocelot]

I advise against using random module in RenPy. It does not participate in rollbacks, and I am not sure if its state is saved.

RenPy itself provides random number generation faculties: https://www.renpy.org/doc/html/other.html#renpy-random

[Mutive]

I don't think the state is saved, but I'm okay with that seeing as I'm just using it as a combat generator. (Where the outcome will branch depending on whether the person survives the battle or not, then the random numbers are kind of useless anyway!)

With that said, thanks for the link to the random generator for Renpy. I'll have to use this from now on! ^_^