Split code

CodeTextSplitter allows you to split your code with multiple languages supported. Import enum Language and specify the language.

%pip install -qU langchain-text-splitters

from langchain_text_splitters import (
    Language,
    RecursiveCharacterTextSplitter,
)

# Full list of supported languages
[e.value for e in Language]

['cpp',
 'go',
 'java',
 'kotlin',
 'js',
 'ts',
 'php',
 'proto',
 'python',
 'rst',
 'ruby',
 'rust',
 'scala',
 'swift',
 'markdown',
 'latex',
 'html',
 'sol',
 'csharp',
 'cobol']

# You can also see the separators used for a given language
RecursiveCharacterTextSplitter.get_separators_for_language(Language.PYTHON)

['\nclass ', '\ndef ', '\n\tdef ', '\n\n', '\n', ' ', '']

Python

Here’s an example using the PythonTextSplitter:

PYTHON_CODE = """
def hello_world():
    print("Hello, World!")

# Call the function
hello_world()
"""
python_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.PYTHON, chunk_size=50, chunk_overlap=0
)
python_docs = python_splitter.create_documents([PYTHON_CODE])
python_docs

[Document(page_content='def hello_world():\n    print("Hello, World!")'),
 Document(page_content='# Call the function\nhello_world()')]

JS

Here’s an example using the JS text splitter:

JS_CODE = """
function helloWorld() {
  console.log("Hello, World!");
}

// Call the function
helloWorld();
"""

js_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.JS, chunk_size=60, chunk_overlap=0
)
js_docs = js_splitter.create_documents([JS_CODE])
js_docs

[Document(page_content='function helloWorld() {\n  console.log("Hello, World!");\n}'),
 Document(page_content='// Call the function\nhelloWorld();')]

TS

Here’s an example using the TS text splitter:

TS_CODE = """
function helloWorld(): void {
  console.log("Hello, World!");
}

// Call the function
helloWorld();
"""

ts_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.TS, chunk_size=60, chunk_overlap=0
)
ts_docs = ts_splitter.create_documents([TS_CODE])
ts_docs

[Document(page_content='function helloWorld(): void {'),
 Document(page_content='console.log("Hello, World!");\n}'),
 Document(page_content='// Call the function\nhelloWorld();')]

Markdown

Here’s an example using the Markdown text splitter:

markdown_text = """
# 🦜️🔗 LangChain

⚡ Building applications with LLMs through composability ⚡

## Quick Install

```bash
# Hopefully this code block isn't split
pip install langchain
```

As an open-source project in a rapidly developing field, we are extremely open to contributions.
"""

md_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.MARKDOWN, chunk_size=60, chunk_overlap=0
)
md_docs = md_splitter.create_documents([markdown_text])
md_docs

[Document(page_content='# 🦜️🔗 LangChain'),
 Document(page_content='⚡ Building applications with LLMs through composability ⚡'),
 Document(page_content='## Quick Install\n\n```bash'),
 Document(page_content="# Hopefully this code block isn't split"),
 Document(page_content='pip install langchain'),
 Document(page_content='```'),
 Document(page_content='As an open-source project in a rapidly developing field, we'),
 Document(page_content='are extremely open to contributions.')]

Latex

Here’s an example on Latex text:

latex_text = """
\documentclass{article}

\begin{document}

\maketitle

\section{Introduction}
Large language models (LLMs) are a type of machine learning model that can be trained on vast amounts of text data to generate human-like language. In recent years, LLMs have made significant advances in a variety of natural language processing tasks, including language translation, text generation, and sentiment analysis.

\subsection{History of LLMs}
The earliest LLMs were developed in the 1980s and 1990s, but they were limited by the amount of data that could be processed and the computational power available at the time. In the past decade, however, advances in hardware and software have made it possible to train LLMs on massive datasets, leading to significant improvements in performance.

\subsection{Applications of LLMs}
LLMs have many applications in industry, including chatbots, content creation, and virtual assistants. They can also be used in academia for research in linguistics, psychology, and computational linguistics.

\end{document}
"""

latex_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.MARKDOWN, chunk_size=60, chunk_overlap=0
)
latex_docs = latex_splitter.create_documents([latex_text])
latex_docs

[Document(page_content='\\documentclass{article}\n\n\x08egin{document}\n\n\\maketitle'),
 Document(page_content='\\section{Introduction}'),
 Document(page_content='Large language models (LLMs) are a type of machine learning'),
 Document(page_content='model that can be trained on vast amounts of text data to'),
 Document(page_content='generate human-like language. In recent years, LLMs have'),
 Document(page_content='made significant advances in a variety of natural language'),
 Document(page_content='processing tasks, including language translation, text'),
 Document(page_content='generation, and sentiment analysis.'),
 Document(page_content='\\subsection{History of LLMs}'),
 Document(page_content='The earliest LLMs were developed in the 1980s and 1990s,'),
 Document(page_content='but they were limited by the amount of data that could be'),
 Document(page_content='processed and the computational power available at the'),
 Document(page_content='time. In the past decade, however, advances in hardware and'),
 Document(page_content='software have made it possible to train LLMs on massive'),
 Document(page_content='datasets, leading to significant improvements in'),
 Document(page_content='performance.'),
 Document(page_content='\\subsection{Applications of LLMs}'),
 Document(page_content='LLMs have many applications in industry, including'),
 Document(page_content='chatbots, content creation, and virtual assistants. They'),
 Document(page_content='can also be used in academia for research in linguistics,'),
 Document(page_content='psychology, and computational linguistics.'),
 Document(page_content='\\end{document}')]

HTML

Here’s an example using an HTML text splitter:

html_text = """
<!DOCTYPE html>
<html>
    <head>
        <title>🦜️🔗 LangChain</title>
        <style>
            body {
                font-family: Arial, sans-serif;
            }
            h1 {
                color: darkblue;
            }
        </style>
    </head>
    <body>
        <div>
            <h1>🦜️🔗 LangChain</h1>
            <p>⚡ Building applications with LLMs through composability ⚡</p>
        </div>
        <div>
            As an open-source project in a rapidly developing field, we are extremely open to contributions.
        </div>
    </body>
</html>
"""

html_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.HTML, chunk_size=60, chunk_overlap=0
)
html_docs = html_splitter.create_documents([html_text])
html_docs

[Document(page_content='<!DOCTYPE html>\n<html>'),
 Document(page_content='<head>\n        <title>🦜️🔗 LangChain</title>'),
 Document(page_content='<style>\n            body {\n                font-family: Aria'),
 Document(page_content='l, sans-serif;\n            }\n            h1 {'),
 Document(page_content='color: darkblue;\n            }\n        </style>\n    </head'),
 Document(page_content='>'),
 Document(page_content='<body>'),
 Document(page_content='<div>\n            <h1>🦜️🔗 LangChain</h1>'),
 Document(page_content='<p>⚡ Building applications with LLMs through composability ⚡'),
 Document(page_content='</p>\n        </div>'),
 Document(page_content='<div>\n            As an open-source project in a rapidly dev'),
 Document(page_content='eloping field, we are extremely open to contributions.'),
 Document(page_content='</div>\n    </body>\n</html>')]

Solidity

Here’s an example using the Solidity text splitter:

SOL_CODE = """
pragma solidity ^0.8.20;
contract HelloWorld {
   function add(uint a, uint b) pure public returns(uint) {
       return a + b;
   }
}
"""

sol_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.SOL, chunk_size=128, chunk_overlap=0
)
sol_docs = sol_splitter.create_documents([SOL_CODE])
sol_docs

[Document(page_content='pragma solidity ^0.8.20;'),
 Document(page_content='contract HelloWorld {\n   function add(uint a, uint b) pure public returns(uint) {\n       return a + b;\n   }\n}')]

C

Here’s an example using the C# text splitter:

C_CODE = """
using System;
class Program
{
    static void Main()
    {
        int age = 30; // Change the age value as needed

        // Categorize the age without any console output
        if (age < 18)
        {
            // Age is under 18
        }
        else if (age >= 18 && age < 65)
        {
            // Age is an adult
        }
        else
        {
            // Age is a senior citizen
        }
    }
}
"""
c_splitter = RecursiveCharacterTextSplitter.from_language(
    language=Language.CSHARP, chunk_size=128, chunk_overlap=0
)
c_docs = c_splitter.create_documents([C_CODE])
c_docs

[Document(page_content='using System;'),
 Document(page_content='class Program\n{\n    static void Main()\n    {\n        int age = 30; // Change the age value as needed'),
 Document(page_content='// Categorize the age without any console output\n        if (age < 18)\n        {\n            // Age is under 18'),
 Document(page_content='}\n        else if (age >= 18 && age < 65)\n        {\n            // Age is an adult\n        }\n        else\n        {'),
 Document(page_content='// Age is a senior citizen\n        }\n    }\n}')]