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如何加载 CSV 数据

¥How to load CSV data

逗号分隔值 (CSV) 文件是一个带分隔符的文本文件，使用逗号分隔值。文件的每一行都是一条数据记录。每条记录由一个或多个字段组成，字段之间用逗号分隔。

¥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.

加载 CSV 数据，每个文档占一行。

¥Load CSV data with a single row per document.

设置​

¥Setup

npm install d3-dsv@2

用法，提取所有列​

¥Usage, extracting all columns

CSV 文件示例：

¥Example CSV file:

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

代码示例：

¥Example code:

import { CSVLoader } from "@langchain/community/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.",
  },
]
*/

用法，提取单列​

¥Usage, extracting a single column

CSV 文件示例：

¥Example CSV file:

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

代码示例：

¥Example code:

import { CSVLoader } from "@langchain/community/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.",
  },
]
*/