import json

def jsonstream(fd):
    while True:
        try:
            here = fd.tell()
            j = json.load(fd)
  
            # if json.load returned successfully, there was only one json doc
            # in the file, so yield it and return from the generator.
            # When there is more than 1 doc, json.load throws an exception,
            # and the exception handler further down extracts the
            # first one by examining the exception data and re-parsing.
            # Of course this is awful but it suffices for now.
            yield j
            return
        except json.decoder.JSONDecodeError as e:
            hlen = e.pos
            fd.seek(here)
            jh = fd.read(hlen)
            assert len(jh)==hlen
            j = json.loads(jh)
            yield j