Re: Seralization

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From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.python
Subject	Re: Seralization
Organization	Decebal Computing
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Date	Sat, 09 May 2015 13:38:16 +0200
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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

Thread

Seralization Cecil Westerhof <Cecil@decebal.nl> - 2015-05-09 10:37 +0200
  Re: Seralization Chris Angelico <rosuav@gmail.com> - 2015-05-09 19:16 +1000
    Re: Seralization Cecil Westerhof <Cecil@decebal.nl> - 2015-05-09 13:38 +0200
  Re: Seralization Cecil Westerhof <Cecil@decebal.nl> - 2015-05-09 15:04 +0200

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