implement json_check function

[jocassid]

Signature def json_check(dict_or_list: Any, allow_datetimes: bool = False, xpath: str = '/') -> Iterator[Tuple[str, str, bool]]

Generator that yields xpath_expression, error_message, is_warning tuples as it encounters errors in the JSON object. The is_warning will be False for most things. This generator operates recursively to traverse the json object the current xpath value is passed in the recursive call

• Checks whether the value passed in is a list or dict
• Allowed types within the json are:
  • int
  • str
  • float
  • list
  • dict
  • datetime, date, and time including timezone aware versions (if allow_datetime argument is True, and I'm not entirely certain about time)
• ensures that dict keys are str and strings aren't empty
• If dict has key that might be confused for a list index in an Xpath expression (i.e. {'100: 'foo'}) report this as a warning by setting the is_warning value to True`

Maybe define namedtuple or dataclass for the tuple being yielded