"Name Error: name 'get_ipython' is not defined" while preparing a debugging session via "import ipdb"

Question

我正在尝试使用 PIP 8.1.2 在 Win10 上的 Python 3.3.5 32 位上安装和使用 ipdb（IPython-enabled pdb）。我已经在 windows cmd 中通过 PIP（必须单独安装）安装，没有错误：

 pip install ipdb

我写了一个简单的测试脚本，希望在打印 'test' 字符串之前在调试器中停止，ipdb_test.py:

import ipdb
ipdb.set_trace()
print('test')

当运行它从 IDLE 编辑器中出现时，会出现以下异常：

Traceback (most recent call last):
  File "C:\Python33.5-32\lib\site-packages\ipdb\__main__.py", line 44, in <module>
    get_ipython
NameError: name 'get_ipython' is not defined

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/temp/ipdb_test.py", line 1, in <module>
    import ipdb
  File "C:\Python33.5-32\lib\site-packages\ipdb\__init__.py", line 7, in <module>
    from ipdb.__main__ import set_trace, post_mortem, pm, run             # noqa
  File "C:\Python33.5-32\lib\site-packages\ipdb\__main__.py", line 51, in <module>

  (...)

  File "C:\Python33.5-32\lib\site-packages\prompt_toolkit\terminal\win32_output.py", line 266, in flush
    self.stdout.flush()
AttributeError: 'NoneType' object has no attribute 'flush'

Answer 1

由于问题似乎与 IPython 有关，我检查了解决 ipdb 依赖项时安装的版本是："ipython-5.1.0"。

该问题的 WA 解决方案恰好回退到 IPython 的 4.2.1 版：

pip install "ipython<5"
    (...)
    Successfully uninstalled ipython-5.1.0
    Successfully installed ipython-4.2.1

之后 ipdb 按预期在断点处停止：

$ python C:\temp\ipdb_test.py
WARNING: Readline services not available or not loaded.
WARNING: Proper color support under MS Windows requires the pyreadline library.
You can find it at:
http://ipython.org/pyreadline.html

Defaulting color scheme to 'NoColor'
> c:\temp\ipdb_test.py(3)<module>()
      1 import ipdb
      2 ipdb.set_trace()
----> 3 print('test')

ipdb>

就此问题联系 IPython 项目团队可能是一个有效的案例，同时我发现运行已完成调试会话的初始任务。

"Name Error: name 'get_ipython' is not defined" while preparing a debugging session via "import ipdb"

"Name Error: name 'get_ipython' is not defined" while preparing a debugging session via "import ipdb"

python

python-3.x

ipython

ipdb