import datetime, OpenSSL, ssl

def getRemoteCert(host, port):
 return ssl.get_server_certificate((host, port))

def getRemoteExpiry(host,port):
 return datetime.datetime.strptime(str(OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, getRemoteCert(host, port)).get_notAfter().decode("UTF-8")), "%Y%m%d%H%M%SZ")