How to load CSV data

A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values. Each line of the file is a data record. Each record consists of one or more fields, separated by commas.

Load CSV data with a single row per document.

Setup

npm

npm install d3-dsv@2

Yarn

yarn add d3-dsv@2

pnpm

pnpm add d3-dsv@2

Usage, extracting all columns

Example CSV file:

id,text
1,This is a sentence.
2,This is another sentence.

Example code:

import { CSVLoader } from "langchain/document_loaders/fs/csv";

const loader = new CSVLoader("src/document_loaders/example_data/example.csv");

const docs = await loader.load();
/*
[
  Document {
    "metadata": {
      "line": 1,
      "source": "src/document_loaders/example_data/example.csv",
    },
    "pageContent": "id: 1
text: This is a sentence.",
  },
  Document {
    "metadata": {
      "line": 2,
      "source": "src/document_loaders/example_data/example.csv",
    },
    "pageContent": "id: 2
text: This is another sentence.",
  },
]
*/

Usage, extracting a single column

Example CSV file:

id,text
1,This is a sentence.
2,This is another sentence.

Example code:

import { CSVLoader } from "langchain/document_loaders/fs/csv";

const loader = new CSVLoader(
  "src/document_loaders/example_data/example.csv",
  "text"
);

const docs = await loader.load();
/*
[
  Document {
    "metadata": {
      "line": 1,
      "source": "src/document_loaders/example_data/example.csv",
    },
    "pageContent": "This is a sentence.",
  },
  Document {
    "metadata": {
      "line": 2,
      "source": "src/document_loaders/example_data/example.csv",
    },
    "pageContent": "This is another sentence.",
  },
]
*/