get_cipher_list() doesn't return !ciphers

When I use set_cipher_list(), I can set the cipher list to HIGH:MEDIUM:!SSLv2:!ADH. But when I call the get_cipher_list() method, it returns only HIGH, MEDIUM, leaving out the !SSLv2, !ADH, even though these were set appropriately. Is there any way to retrieve the blocked ciphers that are part of the list?