Python导入在2.7中工作，但在3.2中失败+

Question

导入包含以下内容的包：

from unique_upload import unique_file_upload

适用于Python2.7，但在Python3.2及更高版本中失败：

ImportError: cannot import name unique_file_upload

项目结构为：

test/ 
   __init__.py
   test_unique_upload # <-- calling from unique_upload import unique_file_upload here

 unique_upload/ 
      __init__.py
      unique_upload

unique_upload/__init__.py包含：

__version__ = '0.2.0'
from unique_upload import unique_file_upload

完整堆栈跟踪：

ImportError: Failed to import test module: test_unqiue_upload
Traceback (most recent call last):
  File "/opt/python/3.5.0/lib/python3.5/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/opt/python/3.5.0/lib/python3.5/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/home/travis/build/agconti/django-unique-upload/test/test_unqiue_upload.py", line 4, in <module>
    from unique_upload import unique_file_upload
  File "/home/travis/build/agconti/django-unique-upload/unique_upload/__init__.py", line 2, in <module>
    from unique_upload import unique_file_upload
ImportError: cannot import name 'unique_file_upload'

知道为什么会这样吗？你知道吗

Answer 1

似乎您正面临一个与Python不兼容的变化：Relative imports，也就是pep328。你知道吗

这应该起作用：

from .unique_upload import unique_file_upload