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| # Ultralytics YOLOv5 🚀, AGPL-3.0 license | |
| """utils/initialization.""" | |
| import contextlib | |
| import platform | |
| import threading | |
| def emojis(str=""): | |
| """Returns an emoji-safe version of a string, stripped of emojis on Windows platforms.""" | |
| return str.encode().decode("ascii", "ignore") if platform.system() == "Windows" else str | |
| class TryExcept(contextlib.ContextDecorator): | |
| # YOLOv5 TryExcept class. Usage: @TryExcept() decorator or 'with TryExcept():' context manager | |
| def __init__(self, msg=""): | |
| """Initializes TryExcept with an optional message, used as a decorator or context manager for error handling.""" | |
| self.msg = msg | |
| def __enter__(self): | |
| """Enter the runtime context related to this object for error handling with an optional message.""" | |
| pass | |
| def __exit__(self, exc_type, value, traceback): | |
| """Context manager exit method that prints an error message with emojis if an exception occurred, always returns | |
| True. | |
| """ | |
| if value: | |
| print(emojis(f"{self.msg}{': ' if self.msg else ''}{value}")) | |
| return True | |
| def threaded(func): | |
| """Decorator @threaded to run a function in a separate thread, returning the thread instance.""" | |
| def wrapper(*args, **kwargs): | |
| """Runs the decorated function in a separate daemon thread and returns the thread instance.""" | |
| thread = threading.Thread(target=func, args=args, kwargs=kwargs, daemon=True) | |
| thread.start() | |
| return thread | |
| return wrapper | |
| def join_threads(verbose=False): | |
| """ | |
| Joins all daemon threads, optionally printing their names if verbose is True. | |
| Example: atexit.register(lambda: join_threads()) | |
| """ | |
| main_thread = threading.current_thread() | |
| for t in threading.enumerate(): | |
| if t is not main_thread: | |
| if verbose: | |
| print(f"Joining thread {t.name}") | |
| t.join() | |
| def notebook_init(verbose=True): | |
| """Initializes notebook environment by checking requirements, cleaning up, and displaying system info.""" | |
| print("Checking setup...") | |
| import os | |
| import shutil | |
| from ultralytics.utils.checks import check_requirements | |
| from utils.general import check_font, is_colab | |
| from utils.torch_utils import select_device # imports | |
| check_font() | |
| import psutil | |
| if check_requirements("wandb", install=False): | |
| os.system("pip uninstall -y wandb") # eliminate unexpected account creation prompt with infinite hang | |
| if is_colab(): | |
| shutil.rmtree("/content/sample_data", ignore_errors=True) # remove colab /sample_data directory | |
| # System info | |
| display = None | |
| if verbose: | |
| gb = 1 << 30 # bytes to GiB (1024 ** 3) | |
| ram = psutil.virtual_memory().total | |
| total, used, free = shutil.disk_usage("/") | |
| with contextlib.suppress(Exception): # clear display if ipython is installed | |
| from IPython import display | |
| display.clear_output() | |
| s = f"({os.cpu_count()} CPUs, {ram / gb:.1f} GB RAM, {(total - free) / gb:.1f}/{total / gb:.1f} GB disk)" | |
| else: | |
| s = "" | |
| select_device(newline=False) | |
| print(emojis(f"Setup complete ✅ {s}")) | |
| return display | |