On Mon, Mar 27, 2017 at 4:27 PM, Wes Turner <wes.tur...@gmail.com> wrote:
> > > On Mon, Mar 27, 2017 at 10:34 AM, Chris Barker <chris.bar...@noaa.gov> > wrote: > >> On Mon, Mar 27, 2017 at 7:59 AM, Paul Moore <p.f.mo...@gmail.com> wrote: >> >>> On 27 March 2017 at 15:40, Ram Rachum <r...@rachum.com> wrote: >>> > Another idea: Maybe make json.load and json.dump support Path objects? >>> >>> If they currently supported filenames, I'd say that's a reasonable >>> extension. Given that they don't, it still seems like more effort than >>> it's worth to save a few characters >>> >> >> Sure, but they probably should -- it's a REALLY common (most common) >> use-case to read and write JSON from a file. And many APIs support >> "filename or open file-like object". >> >> I'd love to see that added, and, or course, support for Path objects as >> well. >> > > > > > > https://docs.python.org/2/library/json.html#encoders-and-decoders > > # https://docs.python.org/2/library/json.html#json.JSONEncoder > > class PathJSONEncoder(json.JSONEncoder): > def default(self, obj): > if isinstance(obj, pathlib.Path): > return unicode(obj) # ? (what about bytes) > return OrderedDict(( > ('@type', 'pydatatypes:pathlib.Path'), # JSON-LD > ('path', unicode(obj)), ) > return json.JSONEncoder.default(self, obj) > > > # https://docs.python.org/2/library/json.html#json.JSONDecoder > def as_pathlib_Path(obj): > if obj.get('@type') == 'pydatatypes:pathlib.Path': > return pathlib.Path(obj.get('path')) > return obj > def as_pathlib_Path(obj): if hasattr(obj, 'get') and obj.get('@type') == 'pydatatypes:pathlib.Path': return pathlib.Path(obj.get('path')) return obj > > > def read_json(self, **kwargs): > object_pairs_hook = kwargs.pop('object_pairs_hook', > collections.OrderedDict) # OrderedDefaultDict > object_hook = kwargs.pop('object_hook', as_pathlib_Path) > encoding = kwargs.pop('encoding', 'utf8') > with codecs.open(self, 'r ', encoding=encoding) as _file: > return json.load(_file, > object_pairs_hook=object_pairs_hook, > object_hook=object_hook, > **kwargs) > > def write_json(self, obj, **kwargs): > kwargs['cls'] = kwargs.pop('cls', PathJSONEncoder) > encoding = kwargs.pop('encoding', 'utf8') > with codecs.open(self, 'w', encoding=encoding) as _file: > return json.dump(obj, _file, **kwargs) > > > def test_pathlib_json_encoder_decoder(): > p = pathlib.Path('./test.json') > obj = dict(path=p, _path=str(unicode(p))) > p.write_json(obj) > obj2 = p.read_json() > assert obj['path'] == obj2['path'] > assert isinstance(obj['path'], pathlib.Path) > should it be 'self' or 'obj'? > > > > https://github.com/jaraco/path.py/blob/master/path.py#L735 > open() > bytes() > chunks() > write_bytes() > text() > def write_text(self, text, encoding=None, errors='strict', > linesep=os.linesep, append=False): > lines() > write_lines() > > read_hash() > read_md5() > read_hexhash() > > > > >> >> -CHB >> >> >> >> >> -- >> >> Christopher Barker, Ph.D. >> Oceanographer >> >> Emergency Response Division >> NOAA/NOS/OR&R (206) 526-6959 voice >> 7600 Sand Point Way NE (206) 526-6329 fax >> Seattle, WA 98115 (206) 526-6317 main reception >> >> chris.bar...@noaa.gov >> >> _______________________________________________ >> Python-ideas mailing list >> Python-ideas@python.org >> https://mail.python.org/mailman/listinfo/python-ideas >> Code of Conduct: http://python.org/psf/codeofconduct/ >> >> >
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