Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!newsfeed.straub-nv.de!newsfeed.pionier.net.pl!feed.xsnews.nl!border03.ams.xsnews.nl!feeder03.ams.xsnews.nl!abp001.ams.xsnews.nl!frontend-F09-20.ams.news.kpn.nl
From: Cecil Westerhof <Cecil@decebal.nl>
Newsgroups: comp.lang.python
Subject: Re: Seralization
Organization: Decebal Computing
References: <876182xi1w.fsf@Equus.decebal.nl> <mailman.279.1431163016.12865.python-list@python.org>
X-Face: "(y8cC@tg_12{">GF'UXTW]FHI2wMiZNrnf'1EFQ&O#$m:f#O7+7}kR<J%a^F2lh4[N~Yz4 nSp#c+aQo1b5=?HcNEkQ7QzF<])O3X4MDL/AYjys&*mt>,v+Pti8=Vi/Z"g^?b"E
X-Homepage: http://www.decebal.nl/
Date: Sat, 09 May 2015 13:38:16 +0200
Message-ID: <87y4kyvv4n.fsf@Equus.decebal.nl>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
Cancel-Lock: sha1:uvdX891Rz4GwWOqMoLxMGoL2Pkw=
MIME-Version: 1.0
Content-Type: text/plain
Lines: 56
NNTP-Posting-Host: 81.207.62.244
X-Trace: 1431171906 news.kpn.nl 21214 81.207.62.244@kpn/81.207.62.244:58306
Xref: csiph.com comp.lang.python:90233

Op Saturday 9 May 2015 11:16 CEST schreef Chris Angelico:

> On Sat, May 9, 2015 at 6:37 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
>> The code:
>> def get_json(json_file):
>> with open(json_file, 'rb') as in_f:
>> return json.load(in_f)
>>
>> def get_marshal(marshal_file):
>> with open(marshal_file, 'rb') as in_f:
>> return marshal.load(in_f)
>>
>> def get_pickle(pickle_file):
>> with open(pickle_file, 'rb') as in_f:
>> return pickle.load(in_f)
>
> def get_any(format, filename):
> with open(filename, 'rb') as in_f:
> return format.load(in_f)

I was thinking about something like that and then let the other three
call this one. I think that:
    data = get_json(json_file)
is nicer to do as:
    data = get_any(json, json_file)


> def any_to_any(fmt1, fmt2, fn1, fn2): data_in = get_any(fmt1, fn1)
> save_any(fmt2, data_in, fn2) data_out = get_any(fmt2, fn2) if
> data_in != data_out: raise SerializationError('Serialization from
> {0} to {1} not successful'. format(fn1, fn2))
>
> formats = [json, pickle, marshal]
> for fmt1 in formats:
> for fmt2 in formats:
> globals()["%s_to_%s" % (fmt1.__name__, fmt2.__name__)] = \
> functools.partial(any_to_any, fmt1, fmt2)
>
>> def json_to_pickle(json_file, pickle_file): data_in =
>> get_json(json_file) save_pickle(data_in, pickle_file) data_out =
>> get_pickle(pickle_file) if data_in == data_out: raise
>> SerializationError('Serialization from {0} to {1} not succesfull'.
>> format(json_file, pickle_file))
>
> def json_to_pickle(json_file, pickle_file): try: any_to_any(json,
> pickle, json_file, pickle_file) except SerializationError: pass
> else: raise SerializationError('Serialization from {0} to {1} not
> successful'. format(json_file, pickle_file))

Was thinking about that also. Only should there be no conversion to
marshal I think.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof