AttributeError: el objeto 'module' no tiene ningún atributo 'strptime' - Posible error?

Question

Estoy un poco confundido sobre por qué estoy recibiendo el error AttributeError: el objeto 'module' no tiene ningún atributo 'strptime'. Cuando importo datetime en mi script de Python y llamo a datetime.datetime.strptime (string, format), todo funciona bien, pero cuando escribo desde datetime import datetime y llamo a datetime.strptime (string, format) mi script falla con el error anterior. Estoy bien usando import datetime y llamando a datetime.datetime, pero todavía tengo curiosidad de por qué desde datetime import datetime se bloquea en la llamada datetime.strptime (string, format). ¿Alguna idea de por qué esto podría estar pasando? Mi código está por debajo ...

Bulkolader.yaml

python_preamble: 
- import: re 
- import: base64 

- import: hs_transformers 

- import: google.appengine.ext.db 
- import: google.appengine.ext.bulkload.transform 
- import: google.appengine.ext.bulkload.bulkloader_wizard 

- import: google.appengine.api.datastore 


transformers: 

- kind: HBO 
    connector: csv 

    property_map: 
    - property: __key__ 
     external_name: swfServerID 
     import_transform: hs_transformers.string 

    - property: IP_address 
     external_name: IP 
     import_transform: hs_transformers.string 

    - property: name 
     external_name: swfServer 
     import_transform: hs_transformers.swfServer 

    - property: checkin 
     external_name: clockStampOfLastCheckin 
     import_transform: hs_transformers.date_time 

    - property: update 
     external_name: clockStampOfLastUpdate 
     import_transform: hs_transformers.clockStampOfLastUpdate 

    - property: form_factor 
     external_name: formFactor 
     import_transform: hs_transformers.string 

    - property: serial_number 
     external_name: serialNumber 
     import_transform: hs_transformers.string 

    - property: reverse_SSH 
     external_name: allowReverseSSH 
     import_transform: hs_transformers.boolean 

    - property: insight_account 
     external_name: FK_insightAccountID 
     import_transform: hs_transformers.integer 

    - property: version 
     external_name: ver 
     import_transform: hs_transformers.string 

hs_transformers.py

import re 
import logging 
from datetime import datetime 
from shared.datastore import * 
import google.appengine.ext.bulkload.transform 
from google.appengine.api import memcache 


def clockStampOfLastUpdate(passed_clockstamp): 
    try: 
     if passed_clockstamp != "NULL": 
      datetime_object = date_time(passed_clockstamp) 
      return_file_update = memcache.get(str(datetime_object), namespace = "HBOImport") 

      if not return_file_update: 
       return_file_update = FileUpdate.lastBefore(datetime_object) 
       memcache.set(str(datetime_object), return_file_update, namespace = "HBOImport", time = 20) 

      if return_file_update != None: return return_file_update.key() 
    except Exception, e: 
     logging.error(e) 


def string(passed_string): 
    try: 
     if passed_string != "NULL": return passed_string 
    except Exception, e: 
     logging.error(e) 


def swfServer(passed_url): 
    try: 
     if passed_url != "NULL": return passed_url.split('//', 1)[1].split('.')[0] 
    except Exception, e: 
     logging.error(e) 


def date_time(passed_datetime): 
    try: 
     if passed_datetime != "NULL": return datetime.strptime(passed_datetime, '%m/%d/%y %H:%M') 
    except Exception, e: 
     logging.error(e) 


def boolean(passed_boolean): 
    try: 
     if passed_boolean != "NULL": 
      if passed_boolean == "T": return True 
      if passed_boolean == "F": return False 
    except Exception, e: 
     logging.error(e) 


def integer(passed_integer): 
    try: 
     if passed_integer != "NULL": return int(passed_integer) 
    except Exception, e: 
     logging.error(e) 

de error cmd ...

Microsoft Windows [Version 6.1.7600] 
Copyright (c) 2009 Microsoft Corporation. All rights reserved. 

C:\Users\Jack Frost>cd "C:\Program Files (x86)\Google App Engine SDK" 

C:\Program Files (x86)\Google App Engine SDK>python appcfg.py upload_data --url=http://bulkloader-testing.appspot.com/remote_api --config_file="C:\Users\Jack Frost\Eclipse Workspace\Headsprout\GAE 2.1.2012\src\utilities\bulkloader\bulkloader.yaml" --filename="C:\Users\Jack Frost\Eclipse Workspace\Headsprout\GAE 2.1.2012\src\utilities\bulkloader\csv_files\small_hbos.csv" --kind=HBO 
Uploading data records. 
[INFO ] Logging to bulkloader-log-20120207.105053 
[INFO ] Throttling transfers: 
[INFO ] Bandwidth: 250000 bytes/second 
[INFO ] HTTP connections: 8/second 
[INFO ] Entities inserted/fetched/modified: 20/second 
[INFO ] Batch Size: 10 
[INFO ] Opening database: bulkloader-progress-20120207.105053.sql3 
[INFO ] Connecting to bulkloader-testing.appspot.com/remote_api 
[INFO ] Starting import; maximum 10 entities per post 
PASSED DATETIME 2/1/12 17:52 
TYPE <type 'unicode'> 
[ERROR ] [WorkerThread-0] WorkerThread: 
Traceback (most recent call last): 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\tools\adaptive_thread_pool.py", line 176, in WorkOnItems 
status, instruction = item.PerformWork(self.__thread_pool) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\tools\bulkloader.py", line 764, in PerformWork 
transfer_time = self._TransferItem(thread_pool) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\tools\bulkloader.py", line 933, in _TransferItem 
self.content = self.request_manager.EncodeContent(self.rows) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\tools\bulkloader.py", line 1394, in EncodeContent 
entity = loader.create_entity(values, key_name=key, parent=parent) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\ext\bulkload\bulkloader_config.py", line 445, in create_entity 
entity = self.dict_to_entity(input_dict, self.bulkload_state) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\ext\bulkload\bulkloader_config.py", line 147, in dict_to_entity 
self.__run_import_transforms(input_dict, instance, bulkload_state_copy) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\ext\bulkload\bulkloader_config.py", line 252, in __run_import_transforms 
value = self.__dict_to_prop(transform, input_dict, bulkload_state) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\ext\bulkload\bulkloader_config.py", line 207, in __dict_to_prop 
value = transform.import_transform(value) 
    File "C:\Program Files (x86)\Google App Engine SDK\google\appengine\ext\bulkload\bulkloader_parser.py", line 111, in __call__ 
return self.method(*args, **kwargs) 
    File "C:\Users\Jack Frost\Eclipse Workspace\Headsprout\GAE 2.1.2012\src\utilities\bulkloader\hs_transformers.py", line 44, in date_time 
print datetime.strptime(passed_datetime, '%m/%d/%y %H:%M') 
AttributeError: 'module' object has no attribute 'strptime' 
[INFO ] [WorkerThread-1] Backing off due to errors: 1.0 seconds 
[INFO ] An error occurred. Shutting down... 
[ERROR ] Error in WorkerThread-0: 'module' object has no attribute 'strptime' 

[INFO ] 10 entities total, 0 previously transferred 
[INFO ] 0 entities (1516 bytes) transferred in 3.0 seconds 
[INFO ] Some entities not successfully transferred 

Answer 1

Quizás

from shared.datastore import * 

está redefiniendo datetime para que sea el módulo.

puede marcar esta conjetura poniendo declaraciones de impresión en el código

from datetime import datetime 
print(datetime) 
from shared.datastore import * 
print(datetime) 

y ver si el valor de datetime ha cambiado.

Si mi suposición es incorrecta, aún puede usar instrucciones de impresión para "bisecar" su código hasta que encuentre qué línea está cambiando el valor de datetime.

(En cualquier caso, es preferible no utilizar el formulario de comodín de importación, ya que puede ser una fuente de estos bichos raros.)