AttributeError：'module'对象没有属性'strptime' - 可能的Bug？

时间：2012-02-07 18:56:14

标签： python google-app-engine import importerror bulkloader

我有点困惑为什么我收到错误AttributeError：'module'对象没有属性'strptime'。当我在Python脚本中导入datetime并调用datetime.datetime.strptime（字符串，格式）时，一切正常，但是当我从datetime import datetime写入并调用datetime.strptime（字符串，格式）时，我的脚本崩溃并出现上述错误。我很好用import datetime并调用datetime.datetime但我仍然很好奇为什么从datetime import datetime崩溃调用datetime.strptime（字符串，格式）。关于为什么会发生这种情况的任何想法？我的代码如下......

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)

cmd错误... 

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

1 个答案:

答案 0 :(得分：13)

也许

from shared.datastore import *

正在重新定义datetime作为模块。

您可以通过在代码中添加print语句来检查此猜测

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

并查看datetime的值是否已更改。

如果我猜错了，你仍然可以使用print语句“平分”代码，直到找到哪一行改变了datetime的值。

（无论如何，最好不要使用通配符形式的导入，因为它可能是这些奇怪错误的来源。）

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