I was trying to install Django. Turns out that course's teacher said that we will be working with Python 3.6
I install Python 3.6. Now it's my default, it somewhat replaced the last version I had; which is Python 3.5.
Everything ok until that. But when I want to install Django doing
"pip3 install django", it tells me that the module is already satisfied and therefore installed.

我试着安装Django。事实证明，该课程的老师说，我们将使用Python 3.6，我安装Python 3.6。现在它是我的默认版本，它在某种程度上取代了我的上一个版本；即Python 3.5。在那之前一切都很好。但当我想安装Django进行“pip3-install-Django”时，它告诉我模块已经满足了，因此安装了。

I run "python3" command into my terminal. It runs Python 3.6. I try to import Django, and boom... "No module named 'django'".

我在终端中运行“python3”命令。它运行Python 3.6。我尝试导入Django，然后。。。“没有名为'django'的模块”。

Then I realized pip3 was actually installing my modules into Python 3.5 and not 3.6. So what I do is to install pip in Python 3.6.

然后我意识到pip3实际上是在把我的模块安装到Python 3.5中，而不是3.6中。所以我所做的就是在Python 3.6中安装pip。

I download get-pip.py and proceed to execute it with Python 3.6 typing in "python3.6 get-pip.py".

我下载了get-pip.py，然后用Python 3.6输入“python3.6 get-pip.py”来执行它。

Here is when the damn "zipimport.ZipImportError: can't decompress data; zlib not available" goes in. I've tried a ton of things and no one of them fixed the %^$! problem. I'm really tired.

这是当该死的“ziimport.ZipImportError:无法解压缩数据；zlib不可用”进入时。我尝试了很多事情，但没有人修复%^$！问题我真的很累。

What I have already tried:
python3.6 -m pip install django, which output is "/usr/local/bin/python3.6: No module named pip"

我已经尝试过：python3.6-m pip-install-django，其输出为“/usr/local/bin/python3.6:No module named pip”

apt install zlib, which output is "E: Unable to locate package zlib"

apt-install-zlib，输出为“E:无法定位包zlib”

apt install zlib1g-dev, which says that it's already installed; the problem persists though.

apt-install zlib1g-dev，表示已经安装；但问题依然存在。

I also came across this problem (while creating a simple installer for pyenv). Here's how I solved it for Mac and Linux:

我也遇到了这个问题（在为pyenv创建一个简单的安装程序时）。以下是我为Mac和Linux解决问题的方法：

Ubuntu 20.04, 18.04

You need the zlib development files, and probably zlib itself too:

您需要zlib开发文件，可能还需要zlib本身：

sudo apt install -y zlib1g-dev zlibc

If you're missing zlib, it's likely that the next problem you'll run into is with openssl, so it's probably best to get that now as well:

如果您缺少zlib，那么您可能会遇到的下一个问题是openssl，所以现在最好也这样做：

sudo apt install -y libssl-dev
sudo apt install -y libssl1.1 || sudo apt install -y libssl1.0

macOS

I believe this comes with XCode CLI Tools (or at least I didn't have to custom install it Big Sur):

我相信这是XCode CLI工具附带的（或者至少我不必自定义安装它Big Sur）：

xcode-select --install

For me it worked in RHEL:
$ yum install zlib-devel

对我来说，它在RHEL:$yum-install-zlib-devel中工作

Suggested solutions (installing zlib1g-dev or zlib-devel) seem to resolve the issue in most cases. Here is one edge case I've encountered recently: whatever you are trying to run might use zlib via symlink which might be broken.

在大多数情况下，建议的解决方案（安装zlib1g-dev或zlib-devel）似乎可以解决这个问题。这是我最近遇到的一个边缘案例：无论你试图运行什么，都可能通过符号链接使用zlib，这可能会被破坏。

In my case I was trying to run a build of a 3rd-party software which already had python and all necessary libs being emebedded into it. It was packaged as a tar.gz archive. Unpacking the archive on a Windows machine and then copying the contents to another linux machine destroyed all the symlinks (if you do ls -l in a folder with symlinks you would see that all of them have size 0 and do not point to anything). Copying tar.gz to the linux machine directly and unpacking it there resolved the issue.

在我的案例中，我试图运行一个第三方软件的构建，该软件已经嵌入了python和所有必要的库。它被打包为tar.gz档案。在Windows机器上打开档案，然后将内容复制到另一台linux机器上，会破坏所有符号链接（如果你在一个有符号链接的文件夹中执行ls-l操作，你会发现所有符号链接的大小都为0，并且没有指向任何东西）。将tar.gz直接复制到linux机器上并在那里拆包就解决了这个问题。

P.S. I know it's an edge case scenario but it took me and one more developer quite a while to figure it out so I think it's worth mentioning here, just in case someone gets as unlucky as I got.

附言：我知道这是一个边缘情况，但我和另一位开发人员花了很长时间才弄清楚，所以我认为这里值得一提，以防有人像我一样倒霉。

Its solves my issue for centos 7.6 :-
yum install zlib-deve

它解决了我在centos 7.6中的问题：-yum-install-zlib-deve

for centos7.x yum install zlib-devel

对于centos7.x，通过百胜安装zlib-devel