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# Okay, have to admit. This code is from StackOverflow. It's so efficient, that it's probably the best way to do it.
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# Although, it is edited to use less threads.
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from itertools import cycle
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from shutil import get_terminal_size
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from threading import Thread
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from time import sleep
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class Loader:
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def __init__(self, desc="Loading...", end="Done!", timeout=0.1):
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"""
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A loader-like context manager
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Args:
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desc (str, optional): The loader's description. Defaults to "Loading...".
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end (str, optional): Final print. Defaults to "Done!".
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timeout (float, optional): Sleep time between prints. Defaults to 0.1.
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"""
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self.desc = desc
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self.end = end
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self.timeout = timeout
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self._thread = Thread(target=self._animate, daemon=True)
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self.steps = ["⢿", "⣻", "⣽", "⣾", "⣷", "⣯", "⣟", "⡿"]
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self.done = False
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def start(self):
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self._thread.start()
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return self
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def _animate(self):
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for c in cycle(self.steps):
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if self.done:
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break
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print(f"\r{self.desc} {c}", flush=True, end="")
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sleep(self.timeout)
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def __enter__(self):
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self.start()
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def stop(self):
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self.done = True
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cols = get_terminal_size((80, 20)).columns
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print("\r" + " " * cols, end="", flush=True)
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print(f"\r{self.end}", flush=True)
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def __exit__(self, exc_type, exc_value, tb):
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# handle exceptions with those variables ^
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self.stop()
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