Op Saturday 9 May 2015 10:37 CEST schreef Cecil Westerhof:
> To make serialization a bit easier I made a few functions to get,
> save and convert between the different types. As I see it pickle and
> json are probably used the most. I also have a get and save for
> marshal. But no conversion to marshal, because in principle you
> should not use it, so a conversion to it is not useful. I did define
> conversion from.
I used the example of Chris to make it a lot cleaner. I like DRY, but
did not know it was that easy in Python.
The code is now:
def convert_serialization(format_in, format_out, filename_in, filename_out):
data_in = get_serialization(format_in, filename_in)
save_serialization(format_out, data_in, filename_out)
data_out = get_serialization(format_out, filename_out)
if data_in != data_out:
raise SerializationError('Serialization from {0} to {1} not
successful'.
format(filename_in, filename_out))
def get_serialization(format, filename):
with open(filename, 'rb') as in_f:
return format.load(in_f)
def save_serialization(format, data, filename):
with open(filename, 'wb') as out_f:
format.dump(data, out_f)
_all_serialization_formats = [json, marshal, pickle]
_convert_to_serialization_formats = [json, pickle]
for format_in in _all_serialization_formats:
globals()[
'save_%s' % (format_in.__name__)
] = functools.partial(save_serialization, format_in)
globals()[
'get_%s' % (format_in.__name__)
] = functools.partial(get_serialization, format_in)
for format_out in _convert_to_serialization_formats:
if format_in == format_out:
continue
globals()[
'%s_to_%s' % (format_in.__name__, format_out.__name__)
] = functools.partial(convert_serialization, format_in, format_out)
del format_in, format_out
I keep the all_serialization_formats and
_convert_to_serialization_formats so you can peek which ones are
supported at the moment.
> Are there other seralizations that is handy to take care of?
That is now a cinch to implement: you only have to append the two
lists. ;-)
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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