Django出于某种原因不想导入某个特定模型

Question

我有一个Django模型，我在里面导入了一些项目：

from django.db import models
from mcif.models.import_profile import ImportProfile
from mcif.models.import_file import ImportFile
from mcif.models.import_bundle import ImportBundle
from mcif.models.customer import Customer
#from mcif.models.account_import import AccountImport
from mcif.models.csv_row import CSVRow
import csv, cStringIO

这个部分运行得很好，但当我把那行注释去掉时，就出现了这个问题：

Traceback (most recent call last):
  File "./manage.py", line 11, in <module>
    execute_manager(settings)
  File "/usr/lib/pymodules/python2.6/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/usr/lib/pymodules/python2.6/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 351, in handle
    return self.handle_noargs(**options)
  File "/usr/lib/pymodules/python2.6/django/core/management/commands/shell.py", line 18, in handle_noargs
    loaded_models = get_models()
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 167, in get_models
    self._populate()
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 64, in _populate
    self.load_app(app_name)
  File "/usr/lib/pymodules/python2.6/django/db/models/loading.py", line 78, in load_app
    models = import_module('.models', app_name)
  File "/usr/lib/pymodules/python2.6/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/jason/projects/mcifdjango/mcif/models/__init__.py", line 5, in <module>
    from mcif.models.account_import import AccountImport
  File "/home/jason/projects/mcifdjango/mcif/models/account_import.py", line 2, in <module>
    from mcif.models.generic_import import GenericImport
  File "/home/jason/projects/mcifdjango/mcif/models/generic_import.py", line 6, in <module>
    from mcif.models.account_import import AccountImport
ImportError: cannot import name AccountImport

为什么Django对这个特定的文件不喜欢呢？

（我可以在控制台上单独加载AccountImport，没有问题。）

另外，这里是AccountImport的内容，如果有帮助的话：

from django.db import models
from mcif.models.generic_import import GenericImport

class AccountImport(models.Model):

    id = models.BigIntegerField(primary_key=True)
    generic_import = models.ForeignKey(GenericImport)
    is_entirely_international = models.IntegerField()
    is_queued = models.IntegerField()
    created_at = models.DateTimeField()
    updated_at = models.DateTimeField()

    class Meta:
        db_table = u'account_import'
        app_name = 'mcif'

还有GenericImport：

from django.db import models
from mcif.models.import_profile import ImportProfile
from mcif.models.import_file import ImportFile
from mcif.models.import_bundle import ImportBundle
from mcif.models.customer import Customer
from mcif.models.csv_row import CSVRow
import csv, cStringIO

class GenericImport(models.Model):

    class Meta:
        db_table = u'generic_import'
        app_name = 'mcif'

    id = models.BigIntegerField(primary_key=True)
    import_profile = models.ForeignKey(ImportProfile)
    import_file = models.ForeignKey(ImportFile)
    notes = models.TextField()
    start_time = models.DateTimeField()
    end_time = models.DateTimeField()
    active = models.IntegerField()
    created_at = models.DateTimeField()
    updated_at = models.DateTimeField()
    unsavable_rows = models.TextField()
    import_bundle = models.ForeignKey(ImportBundle)
    is_queued = models.IntegerField()

    @classmethod
    def last(cls):
        all = GenericImport.objects.all()
        return all[len(all) - 1]

    def process(self):
        for line in self.import_file.file.split("\n")[:30]:
            f = cStringIO.StringIO(line)
            row = CSVRow()
            row.array = next(csv.reader(f))
            row.generic_import = self
            row.process()
            f.close()

    def specific_import(self):
        for model_name in ['TransactionImport', 'AccountImport']:
            specific_imports = eval(model_name + '.objects.filter(generic_import__pk=5)')
            if len(specific_imports) > 0:
                return specific_imports[0]
        return False

django 错误处理控制台调试模型导入项目依赖

Django出于某种原因不想导入某个特定模型

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