usleep in Python

usleep in Python

In Python, you can use the time.sleep() function from the time module to introduce a delay or sleep in your code. However, the time.sleep() function operates in seconds, not microseconds like the usleep function in some other programming languages. If you want to introduce a delay in microseconds (e.g., for very precise timing), you can use the usleep function from the ctypes library to call the C library's usleep function.

Here's how you can use both methods:

Using time.sleep() for Delay in Seconds:

import time # Sleep for 1 second time.sleep(1) # Sleep for 0.5 seconds time.sleep(0.5)

Using ctypes for usleep in Microseconds:

import ctypes def usleep(microseconds): # Define the libc library libc = ctypes.CDLL('libc.so.6') # Call the usleep function from the C library libc.usleep(microseconds) # Sleep for 100 microseconds (0.0001 seconds) usleep(100)

In the usleep function using ctypes, we import the ctypes library and define a function that calls the C library's usleep function. This function allows you to introduce delays in microseconds.

Please note that using usleep for very small delays may not be accurate on all systems due to various factors like system scheduler granularity. If precise timing is crucial, consider using dedicated libraries or hardware for timing and synchronization.

Examples

    import time # Pause execution for 1 second (1000000 microseconds) time.sleep(1) print("Execution resumed after 1 second.") 
      import asyncio async def delay(): await asyncio.sleep(1) # Pause execution for 1 second print("Execution resumed after 1 second.") asyncio.run(delay()) 
        pip install usleep 
        import usleep # Pause execution for 500 microseconds usleep.usleep(500) print("Execution resumed after 500 microseconds.") 
            import time for i in range(5): print("Iteration", i) time.sleep(0.5) # Pause execution for 0.5 seconds (500 milliseconds) 
              import sched import time scheduler = sched.scheduler(time.time, time.sleep) def delayed_print(text, delay): print(text) scheduler.enter(delay, 1, delayed_print, (text, delay)) # Schedule a print every 500 milliseconds for 5 times for i in range(5): delayed_print("Delayed print", 0.5) scheduler.run() 
                  import usleep # Pause execution for 100 microseconds usleep.usleep(100) print("Execution resumed after 100 microseconds.")

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