Python程序求解1-1/3+1/5-1/7+1/9-1/11+...的值

以下是使用Python编写的程序，用于求解1-1/3+1/5-1/7+1/9-1/11+...的值：

def calculate_fraction_sum():
    fraction_sum = 0
    denominator = 1
    sign = 1
    while True:
        fraction = sign / denominator
        fraction_sum += fraction
        denominator += 2
        sign *= -1
        if abs(fraction) < 10 ** (-6):
            break
    return fraction_sum

fraction_sum = calculate_fraction_sum()
formatted_sum = '{:.6f}'.format(fraction_sum)
print(formatted_sum)

输出示例：0.785399