doiorg.lookup.py

import requests

def lookup_via_doidotorg(doi):
    url = "http://doi.org"
    data = {
        "hdl": doi
    }
    response = requests.post(
        url, data=data, headers={'Accept': "application/json"})
    if response.status_code == 404:
        raise RuntimeError("DOI not found")
    elif response.status_code == 200:
        return response.json()
    else:
        raise RuntimeError("Unknown error")