in src/ppxgboost/PaillierAPI.py [0:0]
def assert_ciphertext(encrypted_number):
"""
Check if *encrypted_number* is a valid EncryptedNumber type
:param encrypted_number: input
exit if it is not.
"""
if not isinstance(encrypted_number, phe.EncryptedNumber):
raise ValueError("encrypted input is not a EncryptedNumber Type")