MemoryError in data conversion

[Mok-Kong Shen]

Am 15.04.2014 01:51, schrieb Gregory Ewing:
> Mok-Kong Shen wrote:
>> I have yet a question out of curiosity: Why is my 2nd list structure,
>> that apparently is too complex for handling by eval and json, seemingly
>> not a problem for pickle?
>
> Pickle is intended for arbitrary data structures, so it
> is designed to be able to handle deeply-nested and/or
> recursive data. Eval only has to handle nesting to depths
> likely to be encountered in source code. Apparently the
> json parser also assumes you're not going to be using
> very deep nesting.

What I need is to have my (complicated) list to be put into
a bytearray, do some proceesing, transfer it to the recipient.
The recipient reverses the processing, obtains a bytearray
that is the same as my original one and gets from it the same
list as mine. Using pickle I can manage to do it (in fact I
did try and succeed with my 2nd list), but that's IMHO a
rather unnatural/awkward work-around. (It means that I have
to pickle out the list to a file and read in the content of
the file in order to have it as a bytearray etc. etc.)

M. K. Shen