What methods are used to manage and coordinate threads in Python?

In Python, the following methods and tools from the threading module are used for thread management and coordination:

• Creating and starting threads:

  import threading
  
  def worker():
      print("Thread is running")
  
  t = threading.Thread(target=worker)
  t.start()
  t.join()  # Wait for the thread to finish
  

• Thread synchronization:

  • Lock — a simple mutex to prevent simultaneous access to a resource.
  • RLock — a recursive lock allowing a thread to acquire it multiple times.
  • Event — to notify threads about an event.
  • Condition — for more complex synchronization with waiting and notification.
  • Semaphore — limits the number of threads executing a certain section of code simultaneously.

• Example of using Lock:

  lock = threading.Lock()
  
  def safe_increment(counter):
      with lock:
          counter[0] += 1
  

• Coordination using Event:

  event = threading.Event()
  
  def wait_for_event():
      event.wait()  # Wait for the signal
      print("Event occurred")
  
  def trigger_event():
      event.set()  # Send the signal
  

These methods enable the creation of multithreaded applications with access control to shared resources and thread coordination.