python123第二周练习T9

import time

def calculate_pi(iterations):
    pi = 0
    sign = 1
    denominator = 1
    for i in range(iterations):
        pi += sign * (1 / denominator)
        sign = -sign
        denominator += 2
    return pi * 4

# 简单文本进度条
def simple_progress_bar(iteration, total, prefix='', suffix='', length=50):
    progress = iteration / total
    filled_length = int(length * progress)
    bar = '█' * filled_length + '-' * (length - filled_length)
    print(f'\r{prefix} |{bar}| {progress * 100:.2f}% {suffix}', end='')
    if iteration == total:
        print()

# 计算圆周率并显示进度条
iterations = 1000000
print("使用莱布尼茨公式计算圆周率，进度：")
start_time = time.time()
pi = 0
for i in range(iterations):
    pi += (-1) ** i / (2 * i + 1)
    simple_progress_bar(i + 1, iterations, prefix='进度', suffix='完成')
pi = pi * 4
end_time = time.time()
print(f"计算得到的圆周率：{pi}")
print(f"计算耗时：{end_time - start_time} 秒")