“tests”模块错误导入是什么意思？

Question

我已经一行一行地复制了一个正在工作的测试，并且刚刚更改了几个名称（至少我是这么想的），现在我得到了一个非常神秘的错误：（我用FOO，BAR替换了一些东西）

ImportError: 'tests' module incorrectly imported from 'FOO/exports/tests'. Expected 'FOO/exports'. Is this module globally installed?

问题是我根本不理解这个错误。这个错误信息是什么意思？

完整堆栈跟踪：

Traceback (most recent call last):
  File "BAR/modeling/manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
    utility.execute()
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/__init__.py", line 345, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/commands/test.py", line 30, in run_from_argv
    super(Command, self).run_from_argv(argv)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/base.py", line 348, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/commands/test.py", line 74, in execute
    super(Command, self).execute(*args, **options)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/base.py", line 399, in execute
    output = self.handle(*args, **options)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/core/management/commands/test.py", line 90, in handle
    failures = test_runner.run_tests(test_labels)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/test/runner.py", line 531, in run_tests
    suite = self.build_suite(test_labels, extra_tests)
  File "/Users/jonathan/anaconda/lib/python2.7/site-packages/django/test/runner.py", line 451, in build_suite
    tests = self.test_loader.discover(start_dir=label, **kwargs)
  File "/Users/jonathan/anaconda/lib/python2.7/unittest/loader.py", line 206, in discover
    tests = list(self._find_tests(start_dir, pattern))
  File "/Users/jonathan/anaconda/lib/python2.7/unittest/loader.py", line 267, in _find_tests
    raise ImportError(msg % (mod_name, module_dir, expected_dir))
ImportError: 'tests' module incorrectly imported from 'FOO/exports/tests'. Expected 'FOO/exports'. Is this module globally installed?

Answer 1

根据我的经验，运行测试时出现的奇怪的重要事件是由测试模块本身的重要事件引起的。

确保可以导入测试模块：

$ python manage.py shell
...
>>> import foo.exports.tests

编辑：

如果这会导致错误，请确保没有目录foo/exports/tests和文件foo/exports/tests.py