1. import sys
    2. import time
    3. from tqdm import tqdm
    6. # 自行实现
    7. def progress_bar():
    8.     print('Download progress: ')
    9.     for i in range(1, 101):
    10.         print("\r", end="")
    11.         print("{}%: ".format(i), "▋" * (i // 2), end="")
    12.         sys.stdout.flush()
    13.         time.sleep(0.03)
    16. def progress_bar_time():
    17.     scale = 50
    18.     print("执行开始".center(scale // 2, "-"))
    19.     start = time.perf_counter()
    20.     for i in range(scale + 1):
    21.         a = "=" * i
    22.         b = " " * (scale - i)
    23.         c = (i / scale) * 100
    24.         dur = time.perf_counter() - start
    25.         print("\r{:^3.0f}%[{}=>{}]{:.2f}s".format(c, a, b, dur), end="")
    26.         time.sleep(0.1)
    27.     print("\n" + "执行结束".center(scale // 2, "-"))
    30. # 进度条库
    31. def progress_bar_tqdm():
    32.     for i in tqdm(range(1, 500)):
    33.         time.sleep(0.01)
    34.     time.sleep(0.5)
    37. if __name__ == '__main__':
    38.     # progress_bar()
    39.     # progress_bar_time()
    40.     progress_bar_tqdm()