我试图用pyplot绘制一个简单的图形,例如:

import matplotlib.pyplot as plt
plt.plot([1,2,3],[5,7,4])
plt.show()

但是这个图没有出现,我得到了以下消息:

UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.

我在几个地方看到必须使用以下命令更改matplotlib的配置:

import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt

我这样做了,但得到了一个错误消息,因为它找不到一个模块:

ModuleNotFoundError: No module named 'tkinter'

然后,我尝试使用pip install tkinter(在虚拟环境中)安装“tkinter”,但它没有找到它:

Collecting tkinter
  Could not find a version that satisfies the requirement tkinter (from versions: )
No matching distribution found for tkinter

我还应该提到,我是在使用虚拟环境的Pycharm Community Edition IDE上运行所有这些,并且我的操作系统是Linux/Ubuntu 18.04。

我想知道我如何解决这个问题,以便能够显示图形。


当前回答

如果你使用Arch Linux(发行版如Manjaro或Antegros),只需输入:

sudo pacman -S tk

一切都将完美地工作!

其他回答

After upgrading lots of packages (Spyder 3 to 4, Keras and Tensorflow and lots of their dependencies), I had the same problem today! I cannot figure out what happened; but the (conda-based) virtual environment that kept using Spyder 3 did not have the problem. Although installing tkinter or changing the backend, via matplotlib.use('TkAgg) as shown above, or this nice post on how to change the backend, might well resolve the problem, I don't see these as rigid solutions. For me, uninstalling matplotlib and reinstalling it was magic and the problem was solved.

pip uninstall matplotlib

... 然后,安装

pip install matplotlib

综上所述,这可能是一个包管理问题,顺便说一句,只要可行,我就同时使用conda和pip。

我在Ubuntu 20.04上使用WSL2安装了python3-tk

    import numpy as np
    import matplotlib.pyplot as plt
    import matplotlib
    matplotlib.use( 'tkagg')

然后我从Windows商店安装了GWSL,这似乎解决了WSL2渲染的问题

issue = "用户警告:Matplotlib目前正在使用agg,这是非gui后端,所以不能显示图形。"

这对我很有效

import matplotlib
import matplotlib.pyplot as plt
matplotlib.use('Qt5Agg')

在Mac OS上,我让它工作:

import matplotlib
matplotlib.use('MacOSX')

绘图前请执行以下命令

%matplotlib inline