我在Ubuntu 16.04 LTS (Xenial Xerus)上遇到了同样的问题和同样的错误消息:

命令“python setup.py egg_info”在/tmp/pip-install-w71uo1rg/poster/目录下失败，错误码为1

我测试了上面提供的所有解决方案，没有一个适合我。我阅读了完整的TraceBack，发现我必须用Python 2.7版本来创建虚拟环境(默认使用Python 3.5):

virtualenv --python=/usr/bin/python2.7 my_venv

一旦我激活它，我成功地运行pip install unirest。

方法解决设置。当更新setuptools或其他方法不工作时，Pu egg_info问题。

如果可以安装CONDA版本的库，请使用CONDA而不是pip。 克隆库repo，然后尝试使用pip install -e安装。或者通过python setup.py安装

Download and install the Microsoft Visual C++ Compiler for Python 2.7 from https://www.microsoft.com/en-in/download/details.aspx?id=44266 - this package contains the compiler and set of system headers necessary for producing binary wheels for Python 2.7 packages. Open a command prompt in elevated mode (run as administrator) Firstly do pip install ez_setup Then do pip install unroll (It will start installing numpy, music21, decorator, imageio, tqdm, moviepy, unroll) # Please be patient for music21 installation

Python 2.7.11使用64位

下面是一个小指南，解释了我通常是如何在Python + Windows上安装新包的。看起来你正在使用Windows路径，所以这个答案将坚持特定的so:

I never use a system-wide Python installation. I only use virtualenvs, and usually I try to have the latest version of 2.x & 3.x. My first attempt is always doing pip install package_i_want in some of my Visual Studio command prompts. What Visual Studio command prompt? Well, ideally the Visual Studio which matches the one which was used to build Python. For instance, let's say your Python installation says Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec 5 2015, 20:40:30) [MSC v.1500 64 bit (AMD64)] on win32. The version of Visual Studio used to compile Python can be found here, so v1500 means I'd be using vs2008 x64 command prompt If the previous step failed for some reason I just try using easy_install package_i_want If the previous step failed for some reason I go to gohlke website and I check whether my package is available over there. If it's so, I'm lucky, I just download it into my virtualenv and then I just go to that location using a command prompt and I do pip install package_i_want.whl If the previous step didn't succeed I'll just try to build the wheel myself and once it's generated I'll try to install it with pip install package_i_want.whl

现在，如果我们关注你的具体问题，你在安装展开包时遇到了困难。似乎安装它的最快方法是这样做:

git克隆https://github.com/Zulko/unroll CD展开&& python setup.py bdist_wheel 复制生成的unroll-0.1.0-py2-none-any。WHL文件从创建的dist文件夹到您的virtualenv。 PIP install unroll-0.1.0-py2-none-any.whl

这样安装就不会出现任何问题。要检查它是否真的工作，只需登录到Python安装并尝试导入展开，它应该不会报错。

最后一点:这种方法99%的情况下都是有效的，有时候你会发现一些针对Unix或Mac OS X的pip包，在这种情况下，我想获得Windows版本的最好方法是向主要开发人员发布一些问题，或者自己进行一些有趣的移植到Windows(通常是几个小时，如果你运气不好的话):)

升级pip后解决:

python -m pip install --upgrade pip
pip install "package-name"

将Python升级到版本3解决了我的问题。其他的都没用。