




"""simple docstring"""




import importlib.metadata
import subprocess
import sys







def       __UpperCAmelCase      (				__UpperCamelCase = False					):
			__lowercase	:       int				=   False
			if "IPython" in sys.modules:
						__lowercase	:       str				=   '''google.colab''' in str(sys.modules['''IPython'''].get_ipython()					)

			if in_colab:
						if upgrade:
									__lowercase	:       Tuple				=   ['''pip''', '''install''', '''-U''', '''torch''']
									subprocess.run(__UpperCamelCase					,							check=__UpperCamelCase					)
						# get the current version of torch
						__lowercase	:       int				=   importlib.metadata.version('''torch'''					)
						__lowercase	:       Any				=   torch_version[: torch_version.rindex('''.'''					)]
						__lowercase	:       List[Any]				=   f"""https://storage.googleapis.com/tpu-pytorch/wheels/colab/torch_xla-{torch_version_trunc}-cp37-cp37m-linux_x86_64.whl"""
						__lowercase	:       Optional[Any]				=   ['''pip''', '''install''', xla_wheel]
						subprocess.run(__UpperCamelCase					,							check=__UpperCamelCase					)
			else:
						raise RuntimeError('''`install_xla` utility works only on google colab.'''					)









"""simple docstring"""




from __future__ import annotations







def       __UpperCAmelCase      (				__UpperCamelCase					):
			__lowercase	:       List[Any]				=   [0] * len(__UpperCamelCase					)
			for i in range(1					,							len(__UpperCamelCase					)					):
						__lowercase	:       Optional[Any]				=   duration_times[i - 1] + waiting_times[i - 1]
			return waiting_times







def       __UpperCAmelCase      (				__UpperCamelCase					,							__UpperCamelCase					):
			return [
			    duration_time + waiting_times[i]
			    for i, duration_time in enumerate(__UpperCamelCase					)
			]







def       __UpperCAmelCase      (				__UpperCamelCase					):
			return sum(__UpperCamelCase					) / len(__UpperCamelCase					)







def       __UpperCAmelCase      (				__UpperCamelCase					):
			return sum(__UpperCamelCase					) / len(__UpperCamelCase					)


if __name__ == "__main__":
			# process id's
			a_            =   [1, 2, 3]

			# ensure that we actually have processes
			if len(processes) == 0:
						print('Zero amount of processes')
						raise SystemExit(0)

			# duration time of all processes
			a_            =   [1_9, 8, 9]

			# ensure we can match each id to a duration time
			if len(duration_times) != len(processes):
						print('Unable to match all id\'s with their duration time')
						raise SystemExit(0)

			# get the waiting times and the turnaround times
			a_            =   calculate_waiting_times(duration_times)
			a_            =   calculate_turnaround_times(duration_times, waiting_times)

			# get the average times
			a_            =   calculate_average_waiting_time(waiting_times)
			a_            =   calculate_average_turnaround_time(turnaround_times)

			# print all the results
			print('Process ID\tDuration Time\tWaiting Time\tTurnaround Time')
			for i, process in enumerate(processes):
						print(
						    F"{process}\t\t{duration_times[i]}\t\t{waiting_times[i]}\t\t"
						    F"{turnaround_times[i]}"
						)
			print(F"Average waiting time = {average_waiting_time}")
			print(F"Average turn around time = {average_turnaround_time}")



