为什么我会收到 AttributeError：对象没有属性？

小能豆

为什么我会收到 AttributeError：对象没有属性？

我有一个 MyThread 类。其中，我有一个方法示例。我试图在同一个对象上下文中运行它。请看一下代码：

class myThread (threading.Thread):
    def __init__(self, threadID, name, counter, redisOpsObj):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redisOpsObj

    def stop(self):
        self.kill_received = True

    def sample(self):
        print "Hello"

    def run(self):
        time.sleep(0.1)
        print "\n Starting " + self.name
        self.sample()

看起来很简单，不是吗？但是当我运行它时，我得到了这个错误

AttributeError: 'myThread' object has no attribute 'sample'现在我有了这个方法。那么问题出在哪里？请帮忙

编辑：这是堆栈跟踪

Starting Thread-0

Starting Thread-1
Exception in thread Thread-0:
Traceback (most recent call last):
File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
self.run()
File "./redisQueueProcessor.py", line 51, in run
self.sample()
AttributeError: 'myThread' object has no attribute 'sample'

Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
self.run()
File "./redisQueueProcessor.py", line 51, in run
self.sample()
AttributeError: 'myThread' object has no attribute 'sample'

我这样称呼它

arThreads = []
maxThreads = 2;

for i in range( maxThreads ):
    redisOpsObj = redisOps()
    arThreads.append( myThread(i, "Thread-"+str(i), 10, redisOpsObj) )

抱歉，我无法发布 redisOps 类代码。但我可以向你保证它运行良好

阅读 22

2024-10-12

共1个答案

小能豆

这里的问题在于类的命名约定myThread。Python 区分大小写，因此myThread（小写m）和MyThread（大写M）将被视为两个不同的类。如果您在代码的不同部分使用不同的名称引用该类，则可能会导致问题。

在你贴出的代码中，你好像定义了一个叫的类myThread（小写的m），但是 Python 的内置threading.Thread类有一个专门用于线程执行的方法，就是run()。当这个run()方法调用时self.sample()，它好像是在类中寻找这个sample()方法myThread。

以下是解决此问题的一些建议：

命名一致性：检查类名的一致性，特别是如果您之前已经定义了一个类MyThread（大写M）。由于错误中提到了AttributeError: 'myThread' object has no attribute 'sample'，请确保您没有混淆myThread和MyThread。
检查类继承：由于您的myThread类继承自threading.Thread，请确保run()方法正确存在sample()于

这是

import threading

impor
import time

class MyThread(threading.Thread):  # Ensure consistent class name
    def __init__(self, threadID, name, counter, redisOpsObj):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redisOpsObj
        self.kill_received = 
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redisOpsObj
        self.kill_received =

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redisOpsObj


        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redisOpsObj

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj = redis

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOpsObj

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redisOps

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.redis

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter =

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name

        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name =

        threading.Thread.__init__(self)
        self.threadID = threadID

        threading.Thread.__init__(self)
        self.threadID

        threading.Thread.__init__(self)
        self

        threading.Thread.__init__(

        threading.Thread.__

        threading.Thread

        threading


False  # Initialize this attribute



def stop(self):
        self.kill_received = 
        self.kill_receive

        self.ki

        se
True






def sample(self):

        prin


print("Hello")




def run(self):
        time.sleep(
        time.sleep

        time.s


0.1)

        prin


print("\nStarting " + self.name)
        self.sample()


        self.sample()

        self.sam


# Example of starting threads
arThreads = []
maxThreads = 
arThreads = []
maxThreads 

arThreads = []

arThread

arTh
2

for i in range(maxThreads):
    redisOpsObj = 
    redisOpsObj =

    redisOpsOb

    redisOp


"fakeRedisOpsObj"  # Using a placeholder for redisOps object
    arThreads.append(MyThread(i, 
    arThreads.append(MyThread(i,

    arThreads.append(MyThread

    arThreads
"Thread-" + str(i), 10, redisOpsObj))

for thread in arThreads:
    thread.start()

    thread.start()
``

    thread.start()

    thread.start

    thread

钥匙

类名myThread一致性：MyThread
检查属性初始化：self.kill_received = False在AttributeError``stopstop()`方法中
方法调用：Tsample()是run()方法

这应该可以解决问题。确保您的实际类名和方法名匹配，这样您就不会再遇到AttributeError。

2024-10-12