Which class in the threading module provides a mechanism to synchronize threads by making them wait for each other?SemaphoreBarrierEventCondition

The class in the threading module that provides a mechanism to synchronize threads by making them wait for each other is the Semaphore.

The Semaphore allows a certain number of threads to access a resource at the same time. It contains a counter that holds the number of allowed accesses, and when this counter reaches zero, threads trying to access the resource are blocked until the count is incremented.

In contrast:

• Barrier is used to block a set of threads until they all have reached a certain point of execution.
• Event is a simple way to communicate between threads, typically used to notify one thread that an event has occurred.
• Condition allows threads to wait for some condition to be met.

Therefore, while all these classes provide some synchronization mechanisms, the one specifically designed to make threads synchronize by waiting for each other in a way akin to limiting access is Semaphore.