python send image in post request with json data

1import base64
2import json                    
3
4import requests
5
6api = 'http://localhost:8080/test'
7image_file = 'sample_image.png'
8
9with open(image_file, "rb") as f:
10    im_bytes = f.read()        
11im_b64 = base64.b64encode(im_bytes).decode("utf8")
12
13headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
14  
15payload = json.dumps({"image": im_b64, "other_key": "value"})
16response = requests.post(api, data=payload, headers=headers)
17try:
18    data = response.json()     
19    print(data)                
20except requests.exceptions.RequestException:
21    print(response.text)
22