返回列表python

Question

我有一个代码返回一个列表：

from pysnmp.entity import engine, config
from pysnmp import debug
from pysnmp.entity.rfc3413 import cmdrsp, context, ntforg
from pysnmp.carrier.asynsock.dgram import udp
from pysnmp.smi import builder

import threading
import collections
import time

MibObject = collections.namedtuple('MibObject', ['mibName',
                                   'objectType', 'valueFunc'])


class Mib(object):
    """Stores the data we want to serve. 
    """

    def __init__(self):
        self._lock = threading.RLock()
        self._test_count = 0
        self._test_get = 10
        self._test_set = 0 

    def getTestDescription(self):
        return "My Description"

    def getTestCount(self):
        with self._lock:
            return self._test_count

    def setTestCount(self, value):
        with self._lock:
            self._test_count = value

    def getTestGet(self):
        return self._test_get

    def getTestSet(self):
        return self._test_set

    def setTestSet(self):
        with self._lock:
            self._test_set = value

class ListObject:

    def __init__(self): 
        mib = Mib()
        self.objects = [
            MibObject('MY-MIB', 'testDescription', mib.getTestDescription),
            MibObject('MY-MIB', 'testCount', mib.getTestCount),
            MibObject('MY-MIB', 'testGet', mib.getTestGet),
            MibObject('MY-MIB', 'testSet', mib.getTestSet)
        ]
    def returnTest(self):
        return ListObject()

class main ():        
    print ListObject()

但有时它会返回对象变量，然后它会返回：

<__main__.ListObject instance at 0x16917e8>

我做错什么了？你知道吗

Answer 1

将对象传递给pythonprint时，打印的字符串由其类“str”方法给出。你知道吗

<main.ListObject instance at 0x16917e8>是__str__方法的默认实现返回的字符串。如果尚未为类重写此方法，则结果只是预期的结果。你知道吗

编辑：

如果要在写入print ListObject()时打印objects，则必须重写ListObject__str__(self)方法：

class ListObject:
    def __str__(self):
        return self.objects.__str__()