def default_date_deserializer(obj: str, cls: type = date, **kwargs) -> date:
"""
Deserialize a string with an RFC3339 pattern to a date instance.
:param obj: the string that is to be deserialized.
:param cls: not used.
:param kwargs: not used.
:return: a ``datetime.date`` instance.
"""
return get_datetime_inst(obj, RFC3339_DATE_PATTERN).date()
def default_datetime_deserializer(obj: str,
cls: type = datetime,
**kwargs) -> datetime:
"""
Deserialize a string with an RFC3339 pattern to a datetime instance.
:param obj: the string that is to be deserialized.
:param cls: not used.
:param kwargs: not used.
:return: a ``datetime.datetime`` instance.
"""
pattern = RFC3339_DATETIME_PATTERN
if '.' in obj:
pattern += '.%f'
# strptime allows a fraction of length 6, so trip the rest (if exists).
regex_pattern = re.compile(r'(\.[0-9]+)')
frac = regex_pattern.search(obj).group()
obj = obj.replace(frac, frac[0:7])
return get_datetime_inst(obj, pattern)