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# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
"""
utils/initialization
"""
import contextlib
import platform
import threading
def emojis(str=""):
# Return platform-dependent emoji-safe version of string
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=""):
self.msg = msg
def __enter__(self):
pass
def __exit__(self, exc_type, value, traceback):
if value:
print(emojis(f"{self.msg}{': ' if self.msg else ''}{value}"))
return True
def threaded(func):
# Multi-threads a target function and returns thread. Usage: @threaded decorator
def wrapper(*args, **kwargs):
thread = threading.Thread(
target=func, args=args, kwargs=kwargs, daemon=True
)
thread.start()
return thread
return wrapper
def join_threads(verbose=False):
# Join all daemon threads, i.e. 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):
# Check system software and hardware
print("Checking setup...")
import os
import shutil
from utils.general import check_font, check_requirements, is_colab
from utils.torch_utils import select_device # imports
check_font()
import psutil
from IPython import display # to display images and clear console output
if is_colab():
shutil.rmtree(
"/content/sample_data", ignore_errors=True
) # remove colab /sample_data directory
# System info
if verbose:
gb = 1 << 30 # bytes to GiB (1024 ** 3)
ram = psutil.virtual_memory().total
total, used, free = shutil.disk_usage("/")
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
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