copy_browser_list_between_accounts.py

import requests
from urllib import quote_plus

browser_list_name = quote_plus("browser list name")

from_account = {
    'email' : '',
    'authkey' : ''
}

to_account = {
    'email' : '',
    'authkey' : ''
}

response_browser_list = requests.get('https://app.crossbrowsertesting.com/api/v3/screenshots/browserlists',
    auth=(from_account['email'],from_account['authkey'])).json()[0]['browsers']

browser_string = ''
for i in response_browser_list:
    browser_string += (i['parameter'] + ',')

requests.post('https://app.crossbrowsertesting.com/api/v3/screenshots/browserlists',
    auth=(to_account['email'],to_account['authkey']),
    data={'browser_list_name': browser_list_name,
        'browsers':browser_string})