WP API v2 image upload from media endpoint

/*
 * WP REST API version 2.0-beta7
 * API base url ishttp://www.example.com/wp-json
 *
 * Reference
 * https://wordpress.org/support/topic/new-post-with-image
 */
/*
 * Get Guzzle HTTP Client. That client has been authenticated.
 */
$client = ...
/*
 * Get binary data of image.
 * $path is file path to be uploaded.
 */
$handle                    = fopen($path, 'r');
$fdata                     = fread($handle, filesize($path));
/*
 * Post media.
 * Request to WP REST API media endpoint
 */
$response = $client->request(
  'POST',
  'wp/v2/media',
  [
    'multipart' => [
      [
        'name'     => 'file',
        'contents' => $fdata,
        'filename' => basename($path),
      ],

   ],
);

It finally worked... wow. Thank you so much!

For anyone looking for a python script with media property support:

from requests_toolbelt.multipart.encoder import MultipartEncoder
import requests
import os

def upload_img_wp(imgPath):
    fileName = os.path.basename(imgPath)
    multipart_data = MultipartEncoder(
        fields={
            # a file upload field
            'file': (fileName, open(imgPath, 'rb'), 'image/jpg'),
            # plain text fields
            'alt_text': 'alt test',
            'caption': 'caption test',
            'description': 'description test'
        }
    )

    res = requests.post('http://example.com/wp-json/wp/v2/media', data=multipart_data,
                             headers={'Content-Type': multipart_data.content_type},
                             auth=('user', 'pass'))

    id = 0
    link = ''
    if res.status_code == 201:
        id = res.json()['id']
        link = res.json()['guid']["rendered"]
        #id may be used to set 'featured_media' field of created post
    else:
        print("Unexpected status code: {}".format(response.status_code))

    return id, link