适用于 Linux 的 Windows 子系统显示变量设置 [英] Windows Subsystem for Linux DISPLAY variable setup
问题描述
我正在尝试使用适用于 Linux 的 Windows 子系统，并尝试使用 Matplotlib 创建 python 绘图.但我收到以下错误
I'm experimenting with Windows Subsystem for Linux and am trying to create python plots using Matplotlib. But i get the following error
RuntimeError: Invalid DISPLAY variable
echo DISPLAY 什么也没显示.如何设置 DISPLAY 变量?
echo DISPLAY shows nothing. How can I setup the DISPLAY variable?
推荐答案
Linux 的 Windows 子系统不正式支持图形 GNU/Linux 桌面应用程序，因此我们无法保证调用我们选择的图形程序将作为 Windows 系统调用实现.
The Windows Subsystem for Linux doesn’t officially support graphical GNU/Linux desktop applications, so we have no guarantee that the calls made by our graphical program of choice will be implemented as windows system calls.
您遇到的主要问题是缺少这些程序的图形界面，称为X 服务器".我们可以尝试通过以下方式解决这个问题:
The main issue you are running into is the lack of a graphical interface to these programs, called an "X-server". We can try to get around this problem by:
- 安装 X 服务器(例如 Xming).
- 通过设置环境变量告诉适用于 Linux 的 Windows 子系统将此 X 服务器用作显示器.
对于(1)，安装Xming只需下载并接受默认设置，它会自动启动并等待图形程序显示.
For (1), to install Xming, you can just download and accept the default settings, it will automatically launch and wait for graphical programs to display.
要解决 (2)，在运行图形程序之前，请运行:
To address (2), before you run your graphical program, run:
export DISPLAY=:0
以便 bash 知道将您正在运行的程序的图形输出发送到哪里.
so that bash knows where to send the graphical output of the program you're running.
然后你可以尝试运行一个简单的图形程序(例如gvim或python的turtle模块).
Then you can try running a simple graphical program (for example gvim or python's turtle module).
同样，不能保证这适用于所有 GNU/Linux 应用程序，因为 Microsoft 并没有将每个 Linux 系统调用转换为 Windows 系统调用，并且如果您正在运行的图形程序进行了这样一个不受支持的调用，您的程序可能会崩溃.
Again, there is no guarantee that this will work for all GNU/Linux applications, since Microsoft has not translated every Linux system call to a Windows system call, and if the graphical program you're running makes such an unsupported call, your program may just crash.
这些说明的大部分取自以下指南，该指南展示了如何让 gvim 在适用于 Linux 的 Windows 子系统上工作:
Most of these instructions were taken from the following guide which shows how to get gvim working on Windows Subsystem for Linux:
由于您还询问了检查 DISPLAY 中的内容，我补充说您可以通过运行来检查 DISPLAY 变量的值:
Since you also asked about checking what's in DISPLAY, I'm adding that you can check the value of the DISPLAY variable by running:
echo $DISPLAY
($ 确保 bash 将后面的内容解释为变量，而不是字符串文字.运行 echo DISPLAY 只会回显字符串 DISPLAY.)
(The $ ensures that bash interprets what follows as a variable, rather than a string literal. Running echo DISPLAY will just echo the string DISPLAY.)
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