Question

我正在阅读金字塔框架的教程，我目前仍然坚持teaches the use of Jinja2 as the templating engine.。似乎当我使用nosetests运行测试时，我得到了这个奇怪的ImportError，指出无法从Jinja2模块导入名称Environment。有趣的是，当我pserve网站时，它运作得很好。看起来这个错误只会在测试期间发生......我目前正在使用Ubuntu 14.04处理virtualenv。

有什么建议吗？

这是堆栈跟踪......

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ERROR: test_home (jinja2.tutorial.tests.TutorialFunctionalTests)
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Traceback (most recent call last):
  File "/home/bk/pg/pyramid/quick_tutorial/jinja2/tutorial/tests.py", line 30, in setUp
    app = main({})
  File "/home/bk/pg/pyramid/quick_tutorial/jinja2/tutorial/__init__.py", line 5, in main
    config.include('pyramid_jinja2')
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 727, in include
    c = self.maybe_dotted(callable)
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 825, in maybe_dotted
    return self.name_resolver.maybe_resolve(dotted)
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid/path.py", line 320, in maybe_resolve
    return self._resolve(dotted, package)
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid/path.py", line 327, in _resolve
    return self._zope_dottedname_style(dotted, package)
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid/path.py", line 376, in _zope_dottedname_style
    found = __import__(used)
  File "/home/bk/pg/pyramid/venv/local/lib/python2.7/site-packages/pyramid_jinja2-2.5-py2.7.egg/pyramid_jinja2/__init__.py", line 6, in <module>
    from jinja2 import Environment as _Jinja2Environment
ImportError: cannot import name Environment

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Answer 1

@Michael Merickel是对的。您的jinja2模块与真实模块之间存在冲突。这个错误来自python2导入政治。但是你可以添加你的脚本魔术句from __future__ import absolute_import的第一行。它将相对导入更改为绝对。

更多信息：PEP 0328 -- Imports: Multi-Line and Absolute/Relative

但是，如果您想从/home/bk/pg/pyramid/quick_tutorial/执行脚本，我的解决方案无法帮助您。因为在这种情况下将有两种可能的方法来解决import jinja2。

Answer 2

很难说，但我的第一个猜测是，您看起来像是将项目命名为jinja2，并且这会以某种奇怪的方式与jinja2包冲突，具体取决于执行导入的模块等

pyramid_jinja2：ImportError：无法导入名称环境

2 个答案: