函数SNMPV3_getnext中的Python SNMPV3问题

下面的代码使用pysnmp库在python中实现了snmpv3的getnext

from pysnmp.entity.rfc3413.oneliner import cmdgen
import sys

vallist = []
cmdGen = cmdgen.CommandGenerator()

def snmpv3_getnext(ip='',user='',hash_meth=None,hash_key=None,cry_meth=None,cry_key=None,oid='',num=1,type=None):
#usmHMACMD5AuthProtocol - MD5 hashing
#usmHMACSHAAuthProtocol - SHA hashing
#usmNoAuthProtocol - no authentication
#usmDESPrivProtocol - DES encryption
#usm3DESEDEPrivProtocol - triple-DES encryption
#usmAesCfb128Protocol - AES encryption, 128-bit
#usmAesCfb192Protocol - AES encryption, 192-bit
#usmAesCfb256Protocol - AES encryption, 256-bit
#usmNoPrivProtocol - no encryption
hashval = None
cryval = None
type=None

global vallist
vallist = [None]*num

#NoAuthNoPriv
if hash_meth==None and cry_meth== None:
    hashval =cmdgen.usmNoAuthProtocol
    cryval =cmdgen.usmNoPrivProtocol
    model='NoAuthNoPriv'

#AuthNoPriv
elif hash_meth != None and cry_meth == None:
    if hash_meth=='md5':
        hashval=cmdgen.usmHMACMD5AuthProtocol
    elif hash_meth=='sha':
        hashval=cmdgen.usmHMACSHAAuthProtocol
    else:
        print('el algoritmo hash debe ser md5 o sha')
        return
    cryval = cmdgen.usmNoPrivProtocol
#AuthPriv
elif hash_meth != None and cry_meth != None:
    if hash_meth=='md5':
        hashval=cmdgen.usmHMACMD5AuthProtocol
    elif hash_meth=='sha':
        hashval=cmdgen.usmHMACSHAAuthProtocol
    else:
        print('el algoritmo hash debe ser md5 o sha')
        return
    if cry_meth == '3des':
        cryval = cmdgen.usm3DESEDEPrivProtocol
    elif cry_meth == 'des':
        cryval = cmdgen.usmDESPrivProtocol
    elif cry_meth == 'aes128':
        cryval = cmdgen.usmAesCfb128Protocol
    elif cry_meth == 'aes192':
        cryval = cmdgen.usmAesCfb192Protocol
    elif cry_meth == 'aes256':
        cryval = cmdgen.usmAesCfb256Protocol
    else:
        print('El algoritmo de cifrado debe ser: 3des, des, aes128, aes192  o aes256 ')
        return
# Si no se cumple con las especificaciones
else:
    print(': NoAuthNoPriv, AuthNoPriv, AuthPriv')
    return

errorIndication, errorStatus, errorIndex, varBindTable = cmdGen.nextCmd(
    cmdgen.UsmUserData(user, hash_key, cry_key,
                       authProtocol=hashval,
                       privProtocol=cryval),
    cmdgen.UdpTransportTarget((ip, 161)),
    oid,
    lexicographicMode=True, maxRows=num, ignoreMonIncreasingOid=True
)

if errorIndication:
    print(errorIndication)
else:
    if errorStatus:
        print('%s at %s' % (
            errorStatus.prettyPrint(),
            errorIndex and varBindTable[-1][int(errorIndex)-1] or '?'
            )
        )
    else:
        vallisttmp = []
        for varBindTableRow in varBindTable:
            for name, val in varBindTableRow:
                print('%s = %s' % (name.prettyPrint(), val.prettyPrint()))
                vallisttmp.append(val)
        for i in range(num):
            vallist[i] = vallisttmp[i]

if __name__ == '__main__':
try:
    ip = sys.argv[1]
    user = sys.argv[2]
    hm = sys.argv[3]
    hk = sys.argv[4]
    cm = sys.argv[5]
    ck = sys.argv[6]
    oid = sys.argv[7]
    num = int(sys.argv[8])
    snmpv3_getnext(ip,user,hm,hk,cm,ck,oid,num)

except:
    print('La Configuración de parametros debe ser la siguiente')
    print('python3 get_next.py direccionip nombreusuario algoritmoautenticacion claveautenticacion algoritmocifrado clave cifrado OID numerodeOID')
    print('El algoritmo de autenticacion es compatible con MD5 y SHA')
    print('Compatible con algoritmos de cifrado 3des, des, aes128, aes192, aes256')
    print('Ejemplo')
    print('python3 mygetnext.py 192.168.1.1 user1 sha Cisc0123 des Cisc0123 1.3.6.1.2.1.2.2.1.10.1 10')

一切正常,但我的问题是,当我想发送getnext,但它只是一个用户级别的NoAuthNoPriv或AuthNoPriv时,它不起作用,只有当所有字段都完成时,它才起作用,也就是说,对于AuthPriv用户,我想知道你是否可以帮助我纠正哪些部分