pyodata 1.8.0 - Error if Edm.DateTimeOffset is not set #195

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/model.py in parse_datetime_literal(value)
    388     try:
--> 389         return datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M:%S.%f')
    390     except ValueError:

/opt/tljh/user/lib/python3.7/_strptime.py in _strptime_datetime(cls, data_string, format)
    576     format string."""
--> 577     tt, fraction, gmtoff_fraction = _strptime(data_string, format)
    578     tzname, gmtoff = tt[-2:]

/opt/tljh/user/lib/python3.7/_strptime.py in _strptime(data_string, format)
    358         raise ValueError("time data %r does not match format %r" %
--> 359                          (data_string, format))
    360     if len(data_string) != found.end():

ValueError: time data '0000-00-00T00:00:00' does not match format '%Y-%m-%dT%H:%M:%S.%f'

/opt/tljh/user/lib/python3.7/site-packages/swissparlpy/client.py in __init__(self, entity_request, variables)
     59 class SwissParlResponse(object):
     60     def __init__(self, entity_request, variables):
---> 61         self.entities = entity_request.execute()
     62         self.count = self.entities.total_count
     63         self.variables = variables

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/service.py in execute(self)
    326             self._logger.debug('  body: <cannot be decoded>')
    327 
--> 328         return self._handler(response)
    329 
    330     def custom(self, name, value):

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/service.py in get_entities_handler(response)
   1407             result = ListWithTotalCount(total_count)
   1408             for props in entities:
-> 1409                 entity = EntityProxy(self._service, self._entity_set, self._entity_set.entity_type, props)
   1410                 result.append(entity)
   1411 

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/service.py in __init__(self, service, entity_set, entity_type, proprties, entity_key, etag)
    766                     else:
    767                         # null value is in literal form for now, convert it to python representation
--> 768                         self._cache[type_proprty.name] = type_proprty.from_literal(type_proprty.typ.null_value)
    769 
    770             # then, assign all navigation properties

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/model.py in from_literal(self, value)
    837             return None
    838 
--> 839         return self.typ.traits.from_literal(value)
    840 
    841     def to_literal(self, value):

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/model.py in from_literal(self, value)
    554                 tz_sign = -1 if match.group('sign') == '-' else 1
    555                 tz_info = datetime.timezone(tz_sign * tz_offset)
--> 556             return parse_datetime_literal(datetime_part).replace(tzinfo=tz_info)
    557         except (ValueError, AttributeError):
    558             raise PyODataModelError(f'Cannot decode datetimeoffset from value {value}.')

/opt/tljh/user/lib/python3.7/site-packages/pyodata/v2/model.py in parse_datetime_literal(value)
    395                 return datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M')
    396             except ValueError:
--> 397                 raise PyODataModelError(f'Cannot decode datetime from value {value}.')
    398 
    399 

PyODataModelError: Cannot decode datetime from value 0000-00-00T00:00:00.

def patched_parse_datetime_literal(value):
    print(value)
    if value == '0000-00-00T00:00:00':
        return datetime.datetime(1970, 1, 1)
    try:
        return datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M:%S.%f')
    except ValueError:
        try:
            return datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M:%S')
        except ValueError:
            try:
                return datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M')
            except ValueError:
                raise PyODataModelError(f'Cannot decode datetime from value {value}.')
pyodata.v2.model.parse_datetime_literal = patched_parse_datetime_literal