本内容遵循CC 4.0 BY-SA版权协议 我见过太多人一上来就在终端里敲 pip install matplotlib ，结果要么报一堆看不懂的错，要么装完了一导入就崩。说实话，matplotlib 的安装问题，十有八九不是 matplotlib ...

4.1 现象：运行报 ModuleNotFoundError: No module named 'xxx' 原因：依赖没装全，或者装到了全局环境而你在虚拟环境里跑。 解决：先 pip freeze 看已装列表，缺什么补什么；确认 which python （Windows 用 where python ）指向的是虚拟环境里的解释器。

* Equal contribution. † Corresponding author: Mengshi Qi. Video anomaly detection (VAD) is a critical yet challenging task due to the complex and diverse nature of real-world scenarios. Traditional ...

Ethernet CSMA/CD (collision detection, backoff & retransmission) + Wireless 802.11 DCF (throughput, delay, packet loss) — Packet Tracer topologies paired with a ...