python-2.7 - 在 PyCharm 中使用并排安装了 python 2 和 3 的 Nose 测试

Question

我正在尝试在 PyCharm (2.7.3) 中并排使用与 python 2 和 3 并排安装的 Nose 测试。

在 python 2.7 下一切正常，但 python 3.4 中的任何测试都失败并出现以下错误:

Traceback (most recent call last):
  File "/home/robert/Programme/pycharm-2.7.3/helpers/pycharm/noserunner.py", line 91, in <module>
    process_args()
  File "/home/robert/Programme/pycharm-2.7.3/helpers/pycharm/noserunner.py", line 88, in process_args
    TestProgram(argv=argv, config=config)
  File "/usr/local/lib/python3.4/dist-packages/nose/core.py", line 121, in __init__
    **extra_args)
  File "/usr/lib/python3.4/unittest/main.py", line 93, in __init__
    self.runTests()
  File "/usr/local/lib/python3.4/dist-packages/nose/core.py", line 207, in runTests
    result = self.testRunner.run(self.test)
  File "/usr/local/lib/python3.4/dist-packages/nose/core.py", line 62, in run
    test(result)
  File "/usr/local/lib/python3.4/dist-packages/nose/suite.py", line 177, in __call__
    return self.run(*arg, **kw)
  File "/usr/local/lib/python3.4/dist-packages/nose/suite.py", line 224, in run
    test(orig)
  File "/usr/local/lib/python3.4/dist-packages/nose/suite.py", line 177, in __call__
    return self.run(*arg, **kw)
  File "/usr/local/lib/python3.4/dist-packages/nose/suite.py", line 224, in run
    test(orig)
  File "/usr/local/lib/python3.4/dist-packages/nose/case.py", line 46, in __call__
    return self.run(*arg, **kwarg)
  File "/usr/local/lib/python3.4/dist-packages/nose/case.py", line 139, in run
    result.addError(self, err)
  File "/usr/local/lib/python3.4/dist-packages/nose/proxy.py", line 131, in addError
    plugins.addError(self.test, err)
  File "/usr/local/lib/python3.4/dist-packages/nose/plugins/manager.py", line 99, in __call__
    return self.call(*arg, **kw)
  File "/usr/local/lib/python3.4/dist-packages/nose/plugins/manager.py", line 167, in simple
    result = meth(*arg, **kw)
  File "/home/robert/Programme/pycharm-2.7.3/helpers/pycharm/nose_utils.py", line 51, in addError
    err = self.formatErr(err)
  File "/home/robert/Programme/pycharm-2.7.3/helpers/pycharm/nose_utils.py", line 58, in formatErr
    return ''.join(traceback.format_exception(exctype, value, tb))
  File "/usr/lib/python3.4/traceback.py", line 181, in format_exception
    return list(_format_exception_iter(etype, value, tb, limit, chain))
  File "/usr/lib/python3.4/traceback.py", line 146, in _format_exception_iter
    for value, tb in values:
  File "/usr/lib/python3.4/traceback.py", line 125, in _iter_chain
    context = exc.__context__
AttributeError: 'str' object has no attribute '__context__'

此外，在python 3解释器的nosetest运行的运行配置中，它说:

WARNING: No nosetest runner found in selected interpreter

我该怎么做才能解决这个问题？如何在 pyCharm (2.7.3) 中为 python 3 Nose 测试选择合适的运行者？谢谢!

编辑:顺便说一句，它是 pyCharm 2.7.3

Answer 1

好的，在这里发布我的解决方法，以便其他人更容易找到。更换第 58 行 PathToPyCharm/pycharm-2.7.3/helpers/pycharm/nose_utils.py和

if sys.version_info[0]==3:
    return ''.join(traceback.format_exception(exctype, value, tb, chain=False))
else:
    return ''.join(traceback.format_exception(exctype, value, tb))

制造 nosetests使用 python 3.4 和 2.7。然而，使用 python 3.4，如果发生错误，整个堆栈跟踪就会丢失。结果，调试变成了一场噩梦:(

最后，我通过将我的 PyCharm 版本升级到 3.4.1 解决了这个问题。