Python 使用nosetests --pdb 选项设置断点
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setting breakpoints with nosetests --pdb option
提问by Devin
nosetests --pdblet's me halt upon error or failure, but this is too late for my needs. Stepping through code during execution helps me debug where the problem is.
nosetests --pdb让我在错误或失败时停下来，但这对于我的需要来说太晚了。在执行期间单步执行代码有助于我调试问题所在。
However, nosetests are helpful as they allow tests that rely on relative imports (i.e. tests in a package).
然而，nosetests 很有帮助，因为它们允许依赖于相对导入的测试（即包中的测试）。
How can I set breakpoints before the tests are executed? Currently I'm using:
如何在执行测试之前设置断点？目前我正在使用：
python -m pdb /path/to/my/nosetests testfile.py
This solution isn't adequate. Nosetests interfere with pdb output, and my keyboard controls (e.g. arrow keys) are broken.
这个解决方案是不够的。Nosetests 干扰 pdb 输出，我的键盘控制（例如箭头键）坏了。
Using import pdb; pdb.set_trace() would seem like a good idea, however nosetests is blocking my access to the pdb console.
使用导入 pdb；pdb.set_trace() 看起来是个好主意，但是鼻子测试阻止了我对 pdb 控制台的访问。
采纳答案by Ned Batchelder
You can add
你可以加
import pdb; pdb.set_trace()
anywhere in your source that you want to stop in the debugger.
您想要在调试器中停止的源代码中的任何位置。
Make sure you pass -sto nose so that it does not capture stdout.
确保你传递-s到鼻子，这样它就不会捕捉到stdout。
回答by Matt Luongo
Even better than remembering to use -sis to use the set_tracevariant that comes with Nose. Add
比记住使用更好的-s是使用set_traceNose 附带的变体。添加
from nose.tools import set_trace; set_trace()
wherever you'd like to break in to the debugger. The stdin/out redirection will be taken care of for you. The only strange side effect I've run into is the inability to restart your code from within pdb (using run) while debugging during a nose run.
任何你想进入调试器的地方。标准输入/输出重定向将为您处理。我遇到的唯一奇怪的副作用是run在鼻子运行期间调试时无法从 pdb 中重新启动代码（使用）。
回答by Shubham Chaudhary
If you have ipython, for unlimited awesomeness use:
如果你有ipython，可以无限使用：
import ipdb; ipdb.set_trace()
*unlimited awesomeness: just like ipython - auto-completion, coloring etc.
*无限精彩：就像 ipython - 自动完成、着色等。
回答by gerrit
If you are using pytest, you can use
如果您使用的是pytest，则可以使用
import pytest; pytest.set_trace()
See documentation.
请参阅文档。
