如果你在普通的 Python 脚本或命令行中运行代码，那么不需要 matplotlib_inline，因为普通的 Python 环境不需要这个库来显示 matplotlib 图表。

1. ModuleNotFoundError: No module named 'matplotlib_inline'

Traceback (most recent call last):File "/home/yongqiang/stable_diffusion_work/stable_diffusion_diffusers/yongqiang.py", line 8, in <module>from matplotlib_inline import backend_inline
ModuleNotFoundError: No module named 'matplotlib_inline'

2. matplotlib-inline

https://pypi.org/project/matplotlib-inline/

Matplotlib Inline Back-end for IPython and Jupyter

This package provides support for matplotlib to display figures directly inline in the Jupyter notebook and related clients.

Note that in current versions of JupyterLab and Jupyter Notebook, the explicit use of the %matplotlib inline directive is not needed anymore, though other third-party clients may still require it.
请注意，在 JupyterLab 和 Jupyter Notebook 的当前版本中，不再需要明确使用 %matplotlib inline 指令，但其他第三方客户端可能仍需要它。

pip install matplotlib-inline

(base) yongqiang@yongqiang:~$ pip install matplotlib-inline
Collecting matplotlib-inlineDownloading matplotlib_inline-0.1.7-py3-none-any.whl (9.9 kB)
Collecting traitlets (from matplotlib-inline)Downloading traitlets-5.14.3-py3-none-any.whl (85 kB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 85.4/85.4 kB 147.0 kB/s eta 0:00:00
Installing collected packages: traitlets, matplotlib-inline
Successfully installed matplotlib-inline-0.1.7 traitlets-5.14.3
(base) yongqiang@yongqiang:~$

References

[1] Yongqiang Cheng, https://yongqiang.blog.csdn.net/