ProgressSpinner

import threading
import time

"""A stupid simple, half-baked (literally) class to spin while something loads. Uses threading..."""

class ProgressSpin(threading.Thread):
    def __init__(self, group=None, target=None, name=None, args=(), kwargs=None, *, daemon=False, sleep=0.5, maximum=100.0):
        super().__init__(group, target, name, args, kwargs, daemon=daemon)
        self.sleep = sleep
        self.value = 0
        self.maximum = maximum
        self.done = False

    @property
    def progress(self):
        return 100.0 * self.value / self.maximum

    @progress.setter
    def progress(self, percentage):
        if percentage > 100.0 or percentage < 0.0:
            raise ValueError("Progress percentage should be a value between 0.0 and 100.0")
        self.value = int(percentage * self.maximum)

    def run(self):
        print()
        i = 1
        while i:
            chars = {0: "/", 1: "-", 2: "\\", 3: "|"}
            print("\r{} {:03.02f}%".format(chars.get(i % 4), self.progress), end="")
            time.sleep(self.sleep)
            i += 1
            if self.done and i:
                i = -1  # Fuck you, I think it was clever...
MAX = 500
print("Counting objects...")
p = ProgressSpin(sleep=0.25, maximum=MAX)
p.start()
for n in range(MAX+1):
    p.value = n
    time.sleep(0.01)
p.done = True