danfo.readJSON

Reads a JSON file into DataFrame.

danfo.readJSON(source, options)

Parameters

Type

Description

Default

source

Input file object, string file** **path or URL

Any valid string path is acceptable. The string could be a URL. Valid URL schemes include http, https, ftp, s3, gs, or a local path. Both relative and absolute paths are supported

An input file object is also supported in the browser.

options

Object

Configuration options for reading JSON files. Supported options:

{ method: The HTTP method to use.

headers: Additional headers to send with the request if reading JSON from remote url. Supports all the node-fetch options in Nodejs, and all fetch options in browsers.

}

{ method: "GET" }

The readJSON method can read JSON files from a local disk, over the internet, or directly from input file objects.

Reading JSON files from local disk

const dfd = require("danfojs-node")

dfd.readJSON("./user_names.json")
  .then(df => {
  
   df.head().print()

  }).catch(err=>{
     console.log(err);
  })

Reading JSON files from a URL

By specifying a valid URL, you can load JSON files from any location:

const dfd = require("danfojs-node")

dfd.readJSON("https://raw.githubusercontentdatasets/master/finance-charts-apple.json") 
  .then(df => {
  
   df.head().print()

  }).catch(err=>{
     console.log(err);
  })

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/bundle.min.js"></script>
    <title>Document</title>
</head>

<body>

    <script>
     
     dfd.readJSON("https://raw.githubusercontentdatasets/master/finance-charts-apple.json") 
       .then(df => {
       
        df.head().print()
     
       }).catch(err=>{
          console.log(err);
       })
         
    </script>
</body>

</html>

Reading an input file object in the browser

By specifying a valid file object, you can load a JSON file in the browser:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/bundle.min.js"></script>
    <title>Document</title>
</head>

<body>
    <input type="file" id="file" name="file">
    <script>
            
        inputFile.addEventListener("change", async () => {
            const jsonFile = inputFile.files[0]
            dfd.readJSON(jsonFile).then((df) => {
                df.print()
            })
        })
         
    </script>
</body>

</html>

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Last updated 8 months ago

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