ipdb觸發ImportError

Question

當我在本地運行Django站點時，ipdb為我觸發了導入錯誤。 我正在使用Python 2.7和虛擬環境。

which ipdb顯示的路徑(/usr/local/bin/ipdb)一樣， which ipython ，因為我認為它應該顯示我VENV路徑這讓我吃驚（但如果它是全球性的，無論如何不應該工作？）。 所以我嘗試了pip install --target=/path/to/venv ipdb ，現在它以pip freeze顯示（以前沒有），但仍然給我一個導入錯誤。

which pip給出了/Users/myname/.virtualenvs/myenv/bin/pip/

我的路徑： /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin : /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin :/ /Users/myname/.virtualenvs/myenv/bin:/Users/myname/.venvburrito/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/bin:/usr/local/bin

Sys.path： '/Users/myname/Dropbox/myenv', '/Users/myname/.venvburrito/lib/python2.7/site-packages/pip-1.4.1-py2.7.egg', '/Users/myname/.venvburrito/lib/python2.7/site-packages', '/Users/myname/.venvburrito/lib/python2.7/site-packages/setuptools-8.2-py2.7.egg', '/Users/myname/.virtualenvs/myenv/lib/python27.zip', '/Users/myname/.virtualenvs/myenv/lib/python2.7', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-darwin', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-mac', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/myname/.virtualenvs/myenv/Extras/lib/python', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-tk', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-old', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages'] '/Users/myname/Dropbox/myenv', '/Users/myname/.venvburrito/lib/python2.7/site-packages/pip-1.4.1-py2.7.egg', '/Users/myname/.venvburrito/lib/python2.7/site-packages', '/Users/myname/.venvburrito/lib/python2.7/site-packages/setuptools-8.2-py2.7.egg', '/Users/myname/.virtualenvs/myenv/lib/python27.zip', '/Users/myname/.virtualenvs/myenv/lib/python2.7', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-darwin', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-mac', '/Users/myname/.virtualenvs/myenv/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/myname/.virtualenvs/myenv/Extras/lib/python', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-tk', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-old', '/Users/myname/.virtualenvs/myenv/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages']

如果我從終端運行ipdb，它將正常工作。 我嘗試重新啟動終端。

堆棧跟蹤：

Traceback (most recent call last):
  File "/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages/django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages/django/views/generic/base.py", line 88, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/myname/.virtualenvs/myenv/lib/python2.7/site-packages/django/views/generic/base.py", line 157, in get
    context = self.get_context_data(**kwargs)
  File "/Users/myname/Dropbox/blog/views.py", line 22, in get_context_data
    import ipdb; ipdb.set_trace()
ImportError: No module named ipdb

Answer 1

我只是設置了一個完整的虛擬環境來進行嘗試，因為它必須是一個簡單的修復程序。 我設法在虛擬ipdb中設置了ipdb ，我將逐步編寫內容。

$ virtualenv foo
$ cd foo
$ source ./bin/activate  # activate venv

...此時which python和which pip給了我虛擬環境中正確的python可執行文件。 接下來：

(venv: foo)$ pip install ipython

至此， which ipython給了我虛擬環境中正確的ipython可執行文件。 重要的是要確保它指向正確的可執行文件 ，如果它沒有顯示正確的可執行文件，而是全局文件，請重新激活您的虛擬環境。 至關重要的是，ipython（以及您所有的可執行文件）必須指向您的virtualenv內部正確的可執行文件。

然后我將嘗試導入ipdb：

(venv: foo)$ ipython
In [1]: import ipdb
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-2d6f026194dd> in <module>()
----> 1 import ipdb

ImportError: No module named 'ipdb'

找不到模塊，因為尚未安裝。 我們開始做吧：

(venv: foo)$ pip install ipdb

然后再試一次：

(venv: foo)$ ipython                                                                                                          [ 16-05-24 22:28 ]
Python 3.5.1 (default, Jan 29 2016, 19:58:36) 
Type "copyright", "credits" or "license" for more information.

IPython 4.2.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import ipdb

In [2]: 

它似乎為我工作。 我正在使用zsh和python3但這沒關系。 您的問題很可能是未將其安裝在正確的位置，這意味着使用的是全局可執行文件，而不是virtualenv中的可執行文件。

在我的virtualenv內部，您可以看到已安裝ipdb：

(venv: foo)$ find . -name ipdb
./lib/python3.5/site-packages/ipdb

希望以上所有內容對您有所幫助：）

Answer 2

我正在使用virtualenv-burrito 。 刪除我的venv，更新burrito（ virtualenv-burrito upgrade burrito virtualenv-burrito upgrade ）並制作一個新的虛擬環境解決了該問題。