Python在执行pip和virtualenv时挂起，未产生任何结果 [英] Python hangs while executing pip and virtualenv and brings no results

问题描述

我试图通过执行virtualenv myenv为我的项目设置虚拟环境.该文件夹似乎已生成，但是命令挂起了，我无法执行其他命令.我不得不关闭控制台并重新启动cmd.如我所说，该文件夹已生成，但是我无法通过venv\Scripts\activate激活虚拟环境.

I tried to set up a virtual environment for my project by executing virtualenv myenv. The folder seemed to be generated, but the command hung, and I couldn't execute another command. I had to close the console and restart cmd. The folder was generated, as I said, but I couldn't activate the virtual environment by venv\Scripts\activate.

我在尝试执行pip freeze > requirements.txt时遇到了相同的行为.尽管我在项目中使用了很多软件包，但已生成了文件，但它是空的.当我只执行pip freeze时，将打印软件包列表，但是命令再次挂起，因此我不得不再次关闭控制台.

I met the same behaviour while trying to execute pip freeze > requirements.txt. The file was generated, but it was empty, although I used a lot of packages in my project. When I executed just pip freeze, the list of packages was printed, but the command hung again, and I had to close the console again.

我多次尝试了这两个过程，但均未成功.我在Windows cmd和Anaconda Prompt(Anaconda版本:Anaconda3 2.4.1； Python:3.5.1)中进行了尝试.

I tried both procedures many times, but with no success. I tried that in Windows cmd and Anaconda Prompt (Anaconda version: Anaconda3 2.4.1; Python: 3.5.1).

编辑:几天前我第一次尝试执行此操作时，我成功激活了虚拟环境，但只有一次.

EDIT: when I tried to do this for the very first time some days ago, I succeeded in activating the virtual environment, but only for one time.

推荐答案

一个简单的解决方案(起作用有效)是使用Powershell作为管理员，而不是cmd

A simple solution to this (which does work) would be to use Powershell as an Administrator, instead of cmd.

相反，请使用cmd作为管理员，尽管我建议为所有目的使用功能更强大的Powershell！

Conversely, use cmd as an administrator, though I would recommend using the much-more powerful Powershell for any and all purposes!

为什么有效:

Why this works:

许多命令需要超级用户权限(在Linux中，请考虑root/sudo)，以便正确执行.

A lot of commands need super-user rights (think root/ sudo in linux) in order to be properly executed.

由于Windows中还没有sudo之类的东西，因此您可以通过管理员权限来实现它.

Since there is no such thing as as sudo in Windows yet, you can implement it via admin privileges.

干杯！

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