February 2025
Intermediate
376 pages
9h 25m
Japanese
Content preview from 仕組みからわかる大規模言語モデル 生成AI時代のソフトウェア開発入門
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
5
チェーンのためのLCEL
5.5
LCEL（LangChain Expression Language）は 、 Python に埋め込まれた一種のドメイン特化
言語（DSL：Domain-Specific Language）です。ドメイン特化言語は、特定の用途向けの専用
言語を意味します。ここでの用途は、チェーン構築です。LCELは、Python の演算子をオー
バロードすることでチェーン構築のための構文を提供します。ユーザはLCELが提供する構
文を用いることで短い記述量でチェーンを構築することができます。一般にこのような構文を
糖衣構文（Syntactic Sugar）と呼びます。
糖衣構文は、複雑なコードと同じことを、より簡単なコードで書けるようにするための構文
です。このため、LCEL を使わなくてもLCEL を使う場合と同じことは実現できます。しか
し、LangChainの有用なサンプルなどの多くはLCEL で記述されています。したがって、
LangChainを学ぶ上でも LCELの理解は有用です。また、LCEL をマスターすることで、より
LangChainらしいプログラムを作成することができるでしょう。
そこで、本節ではLCELについてよく使われるパターンを網羅する形で解説を行います。本
節を読むことで、LCELを使って複雑なチェーンが書けるようになるはずです。
5.5.1
プロンプトチェーニングとLCEL
プロンプトチェーニングは、あるプロンプトで得られた応答を次のプロンプトの入力として ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.