[Python-Dev] Iterating over marshal/pickle

M.-A. Lemburg mal at egenix.com
Mon Oct 9 21:48:04 CEST 2006

Fredrik Lundh wrote:
> Tim Lesher wrote:
>> 1. Does this seem like a reasonable addition to the standard library?
> I cannot remember ever doing this, or seeing anyone except Perforce 
> doing this, and it'll only save you a few lines of code every other year 
> or so, so my answer is definitely no.
> (if you're serious about P4 integration, you probably don't want to use 
> Python's marshal.load to deal with the P4 output either; the marshalling 
> code has had a tendency to crash Python when it sees malformed or pre-
> maturely terminated output).
>> Incidentally, I know that pickle is preferred over marshal, but some
>> third-party tools (like the Perforce client) still use the marshal
>> library for serialization, so I've included it in the discussion
> Perforce is the only 3rd party component I'm aware of that uses a 
> standard Python serialization format in this way.
> As the x windows people have observed, the only thing worse than 
> generalizing from one example is generalizing from no examples at
> all..

FWIW, we've been and are using this quite a lot for dumping
database content to a backup file. It's a simple and terse format,
preserves full data precision and doesn't cause problems when
moving between platforms.

That makes two use cases and I'm sure there are more ;-)

Marc-Andre Lemburg

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