Python process will not exit

问题:

I'm use nosetests to run some tests. However, after the tests have finished running, the nosetests process just sits there, and will not exit. Is there anyway to diagnose this? Does Python have a facility similar to sending Java a kill -QUIT which will print a stack trace?

回答1:

You can enter the debugger and type bt:

import pdb; pdb.set_trace()

Then you can step through the operation and see where it hangs.

回答2:

nosetests -vv -x -s --pdb test_foo

where -x is "Stop running tests after the first error or failure" and --pdb is "Drop into debugger on failures or errors"

Also see http://nose.readthedocs.org/en/latest/usage.html