attributeError：模块＆＃x27; memcache＆＃x27;没有属性＆＃x27; client＆＃x27;

Question

最近，我在Python项目中实现了Lock.py，用于使用Memcached锁定线程。但是，我概括了一个错误解决的错误。它说memcache不会构成客户端。我不是直接使用客户端，我相信它只是在导入的模块中被调用。我已经安装了dogpile.cache == 1.1.5和使用PIP的Python-Memcached == 1.59。有人可以帮我吗？

这是完整的错误消息：

Exception in thread Thread-1 (mock_process_repo):
Traceback (most recent call last):
  File "/usr/lib64/python3.10/threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "/usr/lib64/python3.10/threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "/home/jdonic/code/prograde/prograde/lock.py", line 164, in mock_process_repo
    with RepoSyncLock("repository-name"):
  File "/home/jdonic/code/prograde/prograde/lock.py", line 122, in __enter__
    while not lock_cache_region.backend.client.add(
  File "/home/jdonic/.local/lib/python3.10/site-packages/dogpile/cache/backends/memcached.py", line 181, in client
    return self._clients.memcached
  File "/home/jdonic/.local/lib/python3.10/site-packages/dogpile/util/langhelpers.py", line 78, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/home/jdonic/.local/lib/python3.10/site-packages/dogpile/cache/backends/memcached.py", line 169, in _clients
    return ClientPool()
  File "/home/jdonic/.local/lib/python3.10/site-packages/dogpile/cache/backends/memcached.py", line 167, in __init__
    self.memcached = backend._create_client()
  File "/home/jdonic/.local/lib/python3.10/site-packages/dogpile/cache/backends/memcached.py", line 313, in _create_client
    return memcache.Client(self.url)
AttributeError: module 'memcache' has no attribute 'Client'

Answer 1

您可能已经安装了 memcache 安装的python3-memcached，这是一个坏主意。检查您的PIP安装，看看您安装了多少个Memcache客户端：

python3 -m pip freeze | grep memcache

如果您看到多个诸如memcache或python3-memcached之类的东西，那么您需要非常关心，因为它们使用相同的名称空间，所以很可能他们在互相前进：

memcache==0.10.1
python3-memcached==1.51

显然您是您的。正在期望客户端在memcache模块中定义的，因此只需查看一个确实定义的并删除另一个。如果我的内存服务，则python3-memcached == 1.51应该是您想要的。