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新开一个目录，用 python -m venv .venv 创建虚拟环境，再安装pypdf。 如果平时用VS Code，直接把这个虚拟环境选成解释器，后面所有教案打包脚本都能共用同一套依赖。 vscode python环境配置这一步做好，合并、拆分、加书签都会稳定很多。

This tutorial shows how to evaluate a retrieval-augmented generation (RAG) system in Microsoft Fabric. The example measures two things: whether the retriever finds the correct source document in Azure ...

“Five Questions” is a new occasional series where The Daily Sentinel answers questions in a short-form format for quick information for readers. It could also be a two-, three-, four-question format, ...

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Today:Early fog in the far southwest clears quickly. Most areas stay dry with sunshine and variable cloud, though northern and northeastern regions may see isolated showers. Light winds overall, ...

この図形、Pythonで描きました。振り子で描くハーモノグラフという図形をシミュレーションして描画したものです。 ハーモのグラフを描く コードは20行ほどです。使ったのは Matplotlib ...

Are you looking for a database solution for high-scale scenarios with a 99.999% availability service level agreement (SLA), instant autoscale, and automatic failover across multiple regions? Consider ...

A multilayered, thalamorecipient visual cortex emerged ~320 million years ago in stem amniotes. Despite its importance for understanding the evolution of cortical computation, its function remains ...

You are returning from a non-EU country or overseas The introduction into France of food products from a non-EU countryEuropean Union or from overseas territories is very controlled. Some exceptions ...

"Python Tutorial" is an introductory book for beginners that allows you to learn carefully from the basics of Python programming. It gradually levels up from foundations such as syntax, data types, ...

Computer science is more than just coding—it’s a new form of literacy. It’s a computational language that empowers children to solve problems, express ideas, and create meaning in ways traditional ...