JsonParser

class torchdata.datapipes.iter.JsonParser(source_datapipe: IterDataPipe[Tuple[str, IO]], **kwargs)

Reads from JSON data streams and yields a tuple of file name and JSON data (functional name: parse_json_files).

Parameters:

• source_datapipe – a DataPipe with tuples of file name and JSON data stream

• kwargs – keyword arguments that will be passed through to json.loads

Example

>>> from torchdata.datapipes.iter import IterableWrapper, FileOpener
>>> import os
>>> def get_name(path_and_stream):
>>>     return os.path.basename(path_and_stream[0]), path_and_stream[1]
>>> datapipe1 = IterableWrapper(["empty.json", "1.json", "2.json"])
>>> datapipe2 = FileOpener(datapipe1, mode="b")
>>> datapipe3 = datapipe2.map(get_name)
>>> json_dp = datapipe3.parse_json_files()
>>> list(json_dp)
[('1.json', ['foo', {'bar': ['baz', None, 1.0, 2]}]), ('2.json', {'__complex__': True, 'real': 1, 'imag': 2})]