我已经回答了我自己的问题。以下参数可用于 cache.lock() :

def lock(
        self,
        key,
        version=None,
        timeout=None,
        sleep=0.1,
        blocking_timeout=None,
        client=None,
        thread_local=True,
    ):

交叉引用来自python redis源代码的注解，该源代码使用相同的参数：

``timeout`` indicates a maximum life for the lock.
    By default, it will remain locked until release() is called.
    ``timeout`` can be specified as a float or integer, both representing
    the number of seconds to wait.
    ``sleep`` indicates the amount of time to sleep per loop iteration
    when the lock is in blocking mode and another client is currently
    holding the lock.
    ``blocking`` indicates whether calling ``acquire`` should block until
    the lock has been acquired or to fail immediately, causing ``acquire``
    to return False and the lock not being acquired. Defaults to True.
    Note this value can be overridden by passing a ``blocking``
    argument to ``acquire``.
    ``blocking_timeout`` indicates the maximum amount of time in seconds to
    spend trying to acquire the lock. A value of ``None`` indicates
    continue trying forever. ``blocking_timeout`` can be specified as a
    float or integer, both representing the number of seconds to wait.

因此，要设置缓存锁生效的最长时间段（2秒），请执行以下操作：

with cache.lock(key='my_cache_lock_key', timeout=2):
    # Execute some logic here, such as:
    cache.set('some_key', 'Hello world', 3000)