找不到在virtualenv中随PIP安装的模块 [英] Module installed with PIP in virtualenv not found

问题描述

遇到一个非常奇怪的错误.我正在制作一个虚拟环境，并使用pip requirements.txt文件对其进行了初始化，但是当我在激活的环境中运行代码时，虚拟环境解释器声称缺少某些(只有一些)模块:

Getting a very strange error. I am making a virtual environment and initializing it with a pip requirements.txt file, but when I go to run code in the activated environment, the virtual environment interpreter claims to be missing some (and only some) of the modules:

(venv) $ pip list
certifi (2017.7.27.1)
chardet (3.0.4)
decorator (4.1.2)
idna (2.5)
ipython (6.1.0)
ipython-genutils (0.2.0)
jedi (0.10.2)
numpy (1.13.1)
olefile (0.44)
pexpect (4.2.1)
pickleshare (0.7.4)
Pillow (4.2.1)
pip (9.0.1)
prompt-toolkit (1.0.15)
protobuf (3.3.0)
ptyprocess (0.5.2)
Pygments (2.2.0)
PyYAML (3.12)
pyzmq (16.0.2)
requests (2.18.3)
scipy (0.19.1)
setuptools (38.5.1)
simplegeneric (0.8.1)
six (1.10.0)
torch (0.2.0.post3)
torchvision (0.2.0)
tornado (4.5.1)
tqdm (4.15.0)
traitlets (4.3.2)
urllib3 (1.22)
visdom (0.1.5)
wcwidth (0.1.7)
wheel (0.30.0)

所以我要仔细检查:

(venv) $ pip install tqdm 
Requirement already satisfied: tqdm in ./venv/lib/python3.6/site-packages
(venv) $ python  
Python 3.6.3 |Anaconda custom (64-bit)| (default, Oct 13 2017, 12:02:49) 
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from tqdm import tqdm
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'tqdm'

人们建议使用不同的解释器源强制重新安装，并重新安装.这些都不起作用.这是非常神秘的.你们有没有看到过这样的东西?在此处

people have suggested forcing a reinstall, using a different interpreter source, and just reinstalling. None of these have worked. this is very mysterious. Have any of you seen anything like this? Saw a similar unresolved problem here

更新:已修复.感谢/Riverman帮助我发现问题:问题是一段时间前遗留了一个旧的未使用别名，而pip仍然将其指向python3.6，而python命令本身也被别名为我曾经在某个地方躺着一些旧的Anaconda3版本.我忘记了Alias，不要仅仅通过重新打包.bashrc文件就消失了，所以我用令人讨厌的python命令运行了 unalias ，它起作用了！

UPDATE: Fixed. H/T to @Riverman for helping my find the issue: the problem was that an old unused alias was left over from a while ago, and while pip still had it own point back to python3.6, the python command itself was aliased to some old Anaconda3 version I had lying around somewhere. Alias, I forgot, do not go away by just re-sourcing your .bashrc file, so I ran unalias with the offending python command and it worked!

尽管人们可以解释为什么为什么，但仍然会很乐意听取人们的意见.我虽然venv完全使您与外部环境隔绝了...是因为混叠是系统级的效果，所以它会渗透到venv中?

Would still love to hear from people though if they could explain why this can occur, though. I though venv completely insulated you from the outside environment...is it because aliasing is a system level effect so it seeps into the venv??

推荐答案

在virtualenv中，请发出以下命令:

While being inside the virtualenv, please issue the following commands:

• 点冻结
• pip -V
• python -V
• 哪个python
• 哪个点

在此处分享您的结果以进行分析.以前，我在 requests 包中也遇到过类似的问题，但这在我的Windows上发生过.

Share your results here to analyze it. I've also experienced pretty similar issues with the requests package before, but that happened on windows to me.

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