upload.py

import base64
import json
import requests


URL = 'https://api.imgur.com/3/image'
AUTHORIZATION = 'Client-ID c9a6efb3d7932fd'

with open("download.png", 'rb') as f:
    image = base64.b64encode(f.read())
    
    def imgur(images):
        session = requests.Session()
        session.headers['Authorization'] = AUTHORIZATION

        for image in images:
            response = session.post(URL, data=image)

            if response.status_code >= 400:
                print ('Failed to upload image')
                continue

            url = response.json()['data']['link']
            print(url)


    imgur([image])