python - TypeError : exceptions must be old-style classes or derived from BaseException, 不是 NoneType

Question

所以今天这让我困惑了太久。我把它扔给你们。

我得到了

TypeError: exceptions must be old-style classes or derived from BaseException, not NoneType

即使我只是单独使用 raise 或与 Exception() 一起使用时也是如此

这是完整的追溯，以防有帮助。我晕了...

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/home/gus/py274/lib/python2.7/site-packages/IPython/utils/py3compat.pyc in execfile(fname, *where)
    176             else:
    177                 filename = fname
--> 178             __builtin__.execfile(filename, *where)

/home/gus/Dropbox/repos/git/blacktie/src/blacktie/scripts/blacktie_pipeline.py in <module>()
    233 
    234 if __name__ == "__main__":
--> 235     main()

/home/gus/Dropbox/repos/git/blacktie/src/blacktie/scripts/blacktie_pipeline.py in main()
    203             # Prep cuffmerge call
    204             ##ipdb.set_trace()
--> 205             cuffmerge_call = CuffmergeCall(yargs,email_info,run_id,run_logs,conditions=experiment,mode=args.mode)
    206             cuffmerge_call.execute()
    207 

/home/gus/Dropbox/repos/git/blacktie/src/blacktie/utils/calls.pyc in __init__(self, yargs, email_info, run_id, run_logs, conditions, mode)
    627 
    628         self.prog_yargs = self.yargs.cuffmerge_options
--> 629         self.set_call_id()
    630         self.init_log_file()
    631         self.out_dir = self.get_out_dir()

/home/gus/Dropbox/repos/git/blacktie/src/blacktie/utils/calls.pyc in set_call_id(self)
    116             self.call_id = call_id
    117         else:
--> 118             raise Exception()
    119 
    120     def notify_start_of_call(self):

TypeError: exceptions must be old-style classes or derived from BaseException, not NoneType

Answer 1

好吧，我似乎发现问题不在我自己的代码本身。我一直在 Ipython 中运行脚本:因此是顶层跟踪地址。

我决定从终端运行它，并按预期引发了异常。

我自己回答了这个问题，尽管我仍然不知道为什么 Ipython 会导致这种情况发生，因为这似乎是我应该问的一个单独的问题。

不过，希望这有助于有人看到这种奇怪的行为。