{"id":28213,"date":"2025-08-25T05:00:24","date_gmt":"2025-08-25T02:00:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/"},"modified":"2025-08-25T05:00:24","modified_gmt":"2025-08-25T02:00:24","slug":"langchain-ile-prompt-engineering-temelleri-2-gun","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/","title":{"rendered":"LangChain ile Prompt Engineering Temelleri: 2. G\u00fcn"},"content":{"rendered":"<p>LangChain ile Prompt Engineering Temelleri: 2. G\u00fcn<\/p>\n<p>B\u00fcy\u00fck dil modelleri (LLM&#8217;ler) ile etkile\u015fim kurmak ve onlardan en iyi sonu\u00e7lar\u0131 almak i\u00e7in prompt engineering olmazsa olmazd\u0131r.  Bu makalede, LangChain k\u00fct\u00fcphanesini kullanarak prompt engineering temellerini ad\u0131m ad\u0131m \u00f6\u011frenecek, ger\u00e7ek d\u00fcnya senaryolar\u0131na dayal\u0131 \u00f6rnekler inceleyecek ve ileri d\u00fczey tekniklere giri\u015f yapaca\u011f\u0131z.  LangChain&#8217;in sundu\u011fu esneklik ve g\u00fc\u00e7l\u00fc ara\u00e7lar ile prompt&#8217;lar\u0131n\u0131z\u0131 optimize etmeyi ve LLM&#8217;lerden maksimum verim almay\u0131 \u00f6\u011freneceksiniz.<\/p>\n<h2>LangChain Nedir ve Neden \u00d6nemlidir?<\/h2>\n<p>LangChain, b\u00fcy\u00fck dil modellerini (LLM&#8217;ler) uygulamalar\u0131n\u0131za entegre etmenizi kolayla\u015ft\u0131ran g\u00fc\u00e7l\u00fc ve esnek bir Python k\u00fct\u00fcphanesidir.  LLM&#8217;ler, karma\u015f\u0131k g\u00f6revleri yerine getirmek i\u00e7in b\u00fcy\u00fck miktarda veri \u00fczerinde e\u011fitilmi\u015f g\u00fc\u00e7l\u00fc ara\u00e7lard\u0131r.  Ancak, bu modellerden istenen sonu\u00e7lar\u0131 almak i\u00e7in iyi tasarlanm\u0131\u015f prompt&#8217;lar (sorular veya talimatlar) gereklidir. \u0130\u015fte LangChain devreye giriyor:  LangChain, prompt&#8217;lar\u0131n\u0131z\u0131 y\u00f6netmeyi, LLM&#8217;lerden gelen \u00e7\u0131kt\u0131y\u0131 i\u015flemeyi ve farkl\u0131 LLM&#8217;ler aras\u0131nda ge\u00e7i\u015f yapmay\u0131 kolayla\u015ft\u0131ran \u00e7e\u015fitli ara\u00e7lar sunarak, bu s\u00fcreci \u00f6nemli \u00f6l\u00e7\u00fcde basitle\u015ftirir.  Bu sayede, daha geli\u015fmi\u015f ve verimli uygulamalar geli\u015ftirebilirsiniz.  LangChain&#8217;in \u00f6nemi, LLM&#8217;lerin g\u00fcc\u00fcn\u00fc eri\u015filebilir ve kullan\u0131\u015fl\u0131 hale getirmesinden kaynaklan\u0131r.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal&#8217;\u0131n web sitesini<\/a> ziyaret edebilirsiniz.<\/p>\n<h2>Prompt Engineering&#8217;in Temel Kavramlar\u0131: Ba\u015flang\u0131\u00e7 Seviyesi<\/h2>\n<p>Prompt engineering, LLM&#8217;lerden istenen \u00e7\u0131kt\u0131y\u0131 elde etmek i\u00e7in sorular\u0131n\u0131z\u0131 veya talimatlar\u0131n\u0131z\u0131 dikkatlice olu\u015fturma sanat\u0131d\u0131r.  Ba\u015flang\u0131\u00e7 seviyesinde, basit ve a\u00e7\u0131k sorularla ba\u015flamak \u00f6nemlidir.  Belirsiz kelimelerden ka\u00e7\u0131n\u0131n ve sorunuzun amac\u0131n\u0131 net bir \u015fekilde ifade edin.  \u00d6rne\u011fin,  &#8220;Bir hikaye yaz&#8221; yerine &#8220;Bir kedi ve bir k\u00f6pek hakk\u0131nda 100 kelimelik bir hikaye yaz&#8221; daha iyi bir prompt olacakt\u0131r.  Bu netlik, LLM&#8217;nin daha tutarl\u0131 ve ilgili bir yan\u0131t \u00fcretmesine yard\u0131mc\u0131 olur. Ayr\u0131ca, prompt&#8217;unuzda ba\u011flam sa\u011flamak da \u00f6nemlidir.  LLM&#8217;nin ne hakk\u0131nda yazmas\u0131n\u0131 istedi\u011finizi ve hangi t\u00fcr bir yan\u0131t bekledi\u011finizi belirtin.  \u00d6rne\u011fin,  bir \u015fiir yazmas\u0131n\u0131 istiyorsan\u0131z, bunu a\u00e7\u0131k\u00e7a belirtmeniz gerekir.  Ba\u015flang\u0131\u00e7 seviyesi i\u00e7in pratik yapman\u0131n en iyi yolu, farkl\u0131 prompt&#8217;lar deneyerek ve sonu\u00e7lar\u0131 g\u00f6zlemleyerek \u00f6\u011frenmektir.<\/p>\n<h2>LangChain ile Basit Bir Prompt Nas\u0131l Olu\u015fturulur?<\/h2>\n<p>LangChain kullanarak bir LLM ile etkile\u015fim kurmak olduk\u00e7a basittir.  \u00d6ncelikle, LangChain ve bir LLM sa\u011flay\u0131c\u0131s\u0131 (\u00f6rne\u011fin, OpenAI) kurulumunu tamamlaman\u0131z gerekir.  Ard\u0131ndan, a\u015fa\u011f\u0131daki gibi basit bir \u00f6rnek kullanarak  bir prompt olu\u015fturabilirsiniz:<\/p>\n<pre><code class=\"language-python\">from langchain.llms import OpenAI\n\n# OpenAI API anahtar\u0131n\u0131z\u0131 ayarlay\u0131n\nos.environ[\"OPENAI_API_KEY\"] = \"YOUR_API_KEY\"\n\nllm = OpenAI(temperature=0.7)\nprompt = \"Bir kedi ve bir k\u00f6pek hakk\u0131nda k\u0131sa bir hikaye yaz.\"\nresponse = llm(prompt)\nprint(response)<\/pre>\n<p><\/code><\/p>\n<p>Bu kod, OpenAI'nin LLM'sini kullanarak belirtilen prompt'a g\u00f6re bir yan\u0131t \u00fcretir.  <code>temperature<\/code> parametresi, yan\u0131t\u0131n rastgeleli\u011fini kontrol eder.  Daha y\u00fcksek de\u011ferler daha yarat\u0131c\u0131, ancak daha az tutarl\u0131 yan\u0131tlar \u00fcretir.  Bu \u00f6rnek, LangChain'in kullan\u0131m kolayl\u0131\u011f\u0131n\u0131 g\u00f6stermektedir.  Daha karma\u015f\u0131k uygulamalar i\u00e7in, LangChain'in sundu\u011fu di\u011fer ara\u00e7lar\u0131 kullanabilirsiniz.<\/p>\n<h2>Orta Seviye:  Prompt'lar\u0131 Optimize Etme Teknikleri<\/h2>\n<p>Ba\u015flang\u0131\u00e7 seviyesini ge\u00e7ti\u011finizde, prompt'lar\u0131n\u0131z\u0131 optimize etmek i\u00e7in daha geli\u015fmi\u015f teknikleri kullanmaya ba\u015flayabilirsiniz.  Bu teknikler, LLM'lerden daha iyi ve daha ilgili yan\u0131tlar elde etmenizi sa\u011flar.  \u00d6rne\u011fin, <strong>few-shot learning<\/strong>, LLM'ye birka\u00e7 \u00f6rnek vererek istenen davran\u0131\u015f\u0131 \u00f6\u011fretmeyi i\u00e7erir.  Bu, LLM'nin, \u00f6rneklerde g\u00f6r\u00fclen kal\u0131plar\u0131 takip ederek daha tutarl\u0131 yan\u0131tlar \u00fcretmesini sa\u011flar.  Di\u011fer bir teknik ise, <strong>prompt'a ba\u011flam eklemek<\/strong>tir.  LLM'ye daha fazla bilgi sa\u011flayarak, onun daha ilgili ve do\u011fru bir yan\u0131t \u00fcretmesini sa\u011flayabilirsiniz.  \u00d6rne\u011fin, bir \u00f6zet yazd\u0131r\u0131yorsan\u0131z, LLM'ye \u00f6zetlenecek metni de vermeniz yararl\u0131 olacakt\u0131r.  Ayr\u0131ca, <strong>prompt'unuzun uzunlu\u011funu ve karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 dengelemek<\/strong> \u00f6nemlidir.  \u00c7ok uzun veya karma\u015f\u0131k prompt'lar LLM'nin performans\u0131n\u0131 olumsuz etkileyebilir.<\/p>\n<h2>\u0130leri Seviye:  Chain of Thought ve LangChain'in Geli\u015fmi\u015f \u00d6zellikleri<\/h2>\n<p>\u0130leri d\u00fczey prompt engineering,  <strong>Chain of Thought (CoT)<\/strong> gibi daha geli\u015fmi\u015f teknikleri kullanmay\u0131 i\u00e7erir. CoT, LLM'nin mant\u0131ksal ak\u0131l y\u00fcr\u00fctme yetene\u011fini geli\u015ftirmek i\u00e7in kullan\u0131l\u0131r.  LLM'ye, problemi \u00e7\u00f6zmek i\u00e7in ad\u0131m ad\u0131m d\u00fc\u015f\u00fcnmesini sa\u011flayarak daha do\u011fru ve tutarl\u0131 yan\u0131tlar elde edebilirsiniz. LangChain,  <strong>LLM'leri di\u011fer ara\u00e7larla entegre etmek<\/strong> i\u00e7in de g\u00fc\u00e7l\u00fc \u00f6zellikler sunar.  \u00d6rne\u011fin,  LangChain'i bir veritaban\u0131yla entegre ederek, LLM'nin veritaban\u0131ndan bilgi \u00e7ekmesini ve bu bilgiyi kullanarak yan\u0131t \u00fcretmesini sa\u011flayabilirsiniz. Bu, LLM'nin bilgi eri\u015fimini geni\u015fleterek daha kapsaml\u0131 ve do\u011fru yan\u0131tlar \u00fcretmesini sa\u011flar.  Ayr\u0131ca, LangChain ile farkl\u0131 LLM'ler aras\u0131nda ge\u00e7i\u015f yapabilir,  her LLM'nin g\u00fc\u00e7l\u00fc y\u00f6nlerini kullanarak daha iyi sonu\u00e7lar elde edebilirsiniz.  \u00d6rne\u011fin,  bir LLM'yi yarat\u0131c\u0131 i\u00e7erik \u00fcretmek i\u00e7in,  di\u011fer bir LLM'yi ise bilgi \u00e7ekmek i\u00e7in kullanabilirsiniz.<\/p>\n<h2>Ger\u00e7ek D\u00fcnya Senaryolar\u0131: Vaka Analizleri<\/h2>\n<h3>Vaka 1:  \u00dcr\u00fcn A\u00e7\u0131klamas\u0131 Olu\u015fturma<\/h3>\n<p>Bir e-ticaret sitesi i\u00e7in \u00fcr\u00fcn a\u00e7\u0131klamalar\u0131 olu\u015fturmak, LangChain ile kolayca otomatikle\u015ftirilebilir.  \u00dcr\u00fcn \u00f6zelliklerini ve di\u011fer ilgili bilgileri i\u00e7eren bir prompt olu\u015fturarak,  LLM'den ilgi \u00e7ekici ve bilgilendirici \u00fcr\u00fcn a\u00e7\u0131klamalar\u0131 \u00fcretmesini isteyebilirsiniz.  \u00d6rne\u011fin,  bir ayakkab\u0131n\u0131n \u00f6zelliklerini (malzeme, renk, boyut, vb.) i\u00e7eren bir prompt kullanarak, LLM'den bu \u00f6zelliklere dayal\u0131 bir \u00fcr\u00fcn a\u00e7\u0131klamas\u0131 \u00fcretmesini sa\u011flayabilirsiniz.<\/p>\n<h3>Vaka 2:  M\u00fc\u015fteri Destek Botu<\/h3>\n<p>LangChain, m\u00fc\u015fteri destek botlar\u0131 geli\u015ftirmek i\u00e7in kullan\u0131labilir.  M\u00fc\u015fteri sorgular\u0131n\u0131 analiz eden ve ilgili yan\u0131tlar\u0131 \u00fcreten bir LLM kullanarak,  otomatik bir m\u00fc\u015fteri destek sistemi olu\u015fturabilirsiniz.  Bu sistem, m\u00fc\u015fterilerin s\u0131k\u00e7a sorulan sorulara h\u0131zl\u0131 ve do\u011fru yan\u0131tlar almas\u0131n\u0131 sa\u011flayarak,  m\u00fc\u015fteri memnuniyetini art\u0131rabilir.<\/p>\n<h3>Vaka 3:  \u00d6zetleme<\/h3>\n<p>Uzun metinlerin \u00f6zetlenmesi,  LangChain ile kolayca yap\u0131labilen bir ba\u015fka g\u00f6revdir.  Uzun bir makale veya raporu LLM'ye vererek,  \u00f6zetini isteyebilirsiniz.  LLM, metnin ana noktalar\u0131n\u0131 belirleyerek,  kullan\u0131\u015fl\u0131 bir \u00f6zet \u00fcretecektir.  Bu,  zamandan ve emekten tasarruf etmenizi sa\u011flar.<\/p>\n<h2>Performans Kar\u015f\u0131la\u015ft\u0131rmas\u0131: Tablo vs. Liste vs. \u00d6zel \u00c7\u00f6z\u00fcm<\/h2>\n<table>\n<tr>\n<th>Y\u00f6ntem<\/th>\n<th>Performans<\/th>\n<th>Avantajlar<\/th>\n<th>Dezavantajlar<\/th>\n<\/tr>\n<tr>\n<td>Tablo<\/td>\n<td>Orta<\/td>\n<td>D\u00fczenli ve okunabilir<\/td>\n<td>Karma\u015f\u0131k veriler i\u00e7in uygun de\u011fil<\/td>\n<\/tr>\n<tr>\n<td>Liste<\/td>\n<td>Orta<\/td>\n<td>Basit ve kullan\u0131m\u0131 kolay<\/td>\n<td>\u00c7ok fazla veri i\u00e7in karma\u015f\u0131k olabilir<\/td>\n<\/tr>\n<tr>\n<td>\u00d6zel \u00c7\u00f6z\u00fcm (LangChain)<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Esnek ve \u00f6zelle\u015ftirilebilir<\/td>\n<td>Daha fazla geli\u015ftirme s\u00fcresi gerektirir<\/td>\n<\/tr>\n<\/table>\n<h2>G\u00fcvenlik Uyar\u0131lar\u0131<\/h2>\n<div class=\"uyari\">\n  <strong>Dikkat:<\/strong> LLM'lerden gelen yan\u0131tlar\u0131 her zaman kontrol etmeniz ve do\u011frulaman\u0131z \u00f6nemlidir. LLM'ler, yanl\u0131\u015f veya yan\u0131lt\u0131c\u0131 bilgiler \u00fcretebilir.  Yan\u0131tlar\u0131n g\u00fcvenilirli\u011fini sa\u011flamak i\u00e7in g\u00fcvenilir kaynaklar\u0131 kullan\u0131n.\n<\/div>\n<h2>Sonu\u00e7<\/h2>\n<p>LangChain, prompt engineering'i daha eri\u015filebilir ve verimli hale getiren g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.  Bu makalede, LangChain'in temel kavramlar\u0131n\u0131, ileri d\u00fczey tekniklerini ve ger\u00e7ek d\u00fcnya senaryolar\u0131na dayal\u0131 uygulamalar\u0131n\u0131 inceledik.  LangChain'i kullanarak,  LLM'lerden daha iyi sonu\u00e7lar elde edebilir ve daha geli\u015fmi\u015f uygulamalar geli\u015ftirebilirsiniz.  Daha fazla bilgi ve ileri teknikler i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal'\u0131n web sitesini<\/a> ziyaret etmenizi \u00f6neririz.<\/p>\n<h3>S\u0131k\u00e7a Sorulan Sorular<\/h3>\n<ul>\n<li><strong>LangChain'i nas\u0131l kurar\u0131m?<\/strong>  <code>pip install langchain<\/code> komutunu kullanarak LangChain'i kurabilirsiniz.<\/li>\n<li><strong>Hangi LLM'leri LangChain ile kullanabilirim?<\/strong>  LangChain, OpenAI, Hugging Face ve di\u011fer bir\u00e7ok LLM sa\u011flay\u0131c\u0131s\u0131yla uyumludur.<\/li>\n<li><strong>LangChain'in \u00f6\u011frenme e\u011frisi nas\u0131ld\u0131r?<\/strong>  LangChain'in \u00f6\u011frenme e\u011frisi, temel kavramlar\u0131 \u00f6\u011frenmek i\u00e7in nispeten kolayd\u0131r, ancak geli\u015fmi\u015f \u00f6zelliklerini kullanmak i\u00e7in daha fazla deneyim gerektirebilir.<\/li>\n<li><strong>LangChain ile hangi uygulamalar\u0131 geli\u015ftirebilirim?<\/strong>  LangChain ile chatbot'lar, \u00f6zetleme ara\u00e7lar\u0131, metin olu\u015fturma ara\u00e7lar\u0131 ve daha bir\u00e7ok uygulama geli\u015ftirebilirsiniz.<\/li>\n<li><strong>LangChain'in \u00fccretlendirmesi nas\u0131l \u00e7al\u0131\u015f\u0131r?<\/strong>  LangChain \u00fccretsiz ve a\u00e7\u0131k kaynakl\u0131d\u0131r, ancak kulland\u0131\u011f\u0131n\u0131z LLM sa\u011flay\u0131c\u0131s\u0131n\u0131n \u00fccretlendirmesi ge\u00e7erlidir.<\/li>\n<\/ul>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"LangChain ile Prompt Engineering Temelleri: 2. G\u00fcn B\u00fcy\u00fck dil modelleri (LLM&#8217;ler) ile etkile\u015fim kurmak ve onlardan en iyi&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-28213","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LangChain ile Prompt Engineering Temelleri: 2. G\u00fcn<\/title>\n<meta name=\"description\" content=\"B\u00fcy\u00fck dil modelleri (LLM&#039;ler) ile etkile\u015fim kurmak ve onlardan en iyi sonu\u00e7lar\u0131 almak i\u00e7in prompt engineering olmazsa olmazd\u0131r. Bu makalede, LangChain k\u00fct\u00fcphanesini kullanarak prompt engineering temellerini ad\u0131m ad\u0131m \u00f6\u011frenecek, ger\u00e7ek d\u00fcnya senaryolar\u0131na dayal\u0131 \u00f6rnekler inceleyecek ve ileri d\u00fczey tekniklere giri\u015f yapaca\u011f\u0131z. LangChain&#039;in sundu\u011fu esneklik ve g\u00fc\u00e7l\u00fc ara\u00e7lar ile prompt&#039;lar\u0131n\u0131z\u0131 optimize etmeyi ve LLM&#039;lerden maksimum verim almay\u0131 \u00f6\u011freneceksiniz.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LangChain ile Prompt Engineering Temelleri: 2. G\u00fcn\" \/>\n<meta property=\"og:description\" content=\"B\u00fcy\u00fck dil modelleri (LLM&#039;ler) ile etkile\u015fim kurmak ve onlardan en iyi sonu\u00e7lar\u0131 almak i\u00e7in prompt engineering olmazsa olmazd\u0131r. Bu makalede, LangChain k\u00fct\u00fcphanesini kullanarak prompt engineering temellerini ad\u0131m ad\u0131m \u00f6\u011frenecek, ger\u00e7ek d\u00fcnya senaryolar\u0131na dayal\u0131 \u00f6rnekler inceleyecek ve ileri d\u00fczey tekniklere giri\u015f yapaca\u011f\u0131z. LangChain&#039;in sundu\u011fu esneklik ve g\u00fc\u00e7l\u00fc ara\u00e7lar ile prompt&#039;lar\u0131n\u0131z\u0131 optimize etmeyi ve LLM&#039;lerden maksimum verim almay\u0131 \u00f6\u011freneceksiniz.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-25T02:00:24+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/langchain-ile-prompt-engineering-temelleri-2-gun\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"LangChain ile Prompt Engineering Temelleri: 2. 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