evernote_url.py

try:
    # Python 3
    from urllib.parse import urlparse
except ImportError:
    # Python 2.x
    from urlparse import urlparse

def evernote_url_to_ios_url(url):
    parsed = urlparse(url)
    assert parsed.netloc == "www.evernote.com" or parsed.netloc == "sandbox.evernote.com
    split_path = parsed.path.split("/")
    shard_id = split_path[2]
    user_id = split_path[4]
    note_guid = split_path[5]
    return "evernote:///view/{shard_id}/{user_id}/{note_guid}/".format(
        shard_id=shard_id, user_id=user_id, note_guid=note_guid)

Documentation: https://dev.evernote.com/doc/articles/note_links.php