Incompatibility with pypy interpreter

[sebastian-brunner]

When trying to use jsonconversion with the pypy interpreter (e.g. pypy3.6 /custom/patch/python-jsonconversion/test/test_jsonobjects.py) the following error occurs:

  File "/home/basti/develop/python-jsonconversion/test/test_jsonobjects.py", line 12, in <module>
    from testing_utils import convert_with_assertion
  File "/home/basti/develop/python-jsonconversion/test/testing_utils.py", line 17, in <module>
    from jsonconversion.encoder import JSONObjectEncoder
  File "/home/basti/develop/python-jsonconversion/src/jsonconversion/encoder.py", line 13, in <module>
    from json.encoder import JSONEncoder, _make_iterencode, encode_basestring, encode_basestring_ascii, INFINITY
ImportError: cannot import name '_make_iterencode'

The '_make_iterencode' is a protected member os json.encoder. Is there a possibility to only use the public API of json.encoder?

[franzlst]

The docstring of the iterencode method that uses _make_iterencode explains why this import is required. Otherwise, the whole ~200 LOC function would be required to be copied into the module.

Does pypy not support the import of private methods or where is the exact problem?

[franzlst]

I could imagine that the reason for the error is PyPy's custom json module. If so, it would be interesting if JSONConversion is in general able to work with PyPy's JSON module. Maybe you can locally copy the private function and verify that it is working then.