常见计算 格式化数据

百分数

def convert_percent(i: float) -> tuple[str, str]:
    def f(i: float) -> str:
        '''
        四十五入，百分数，2位
        0.12345 12.35%
        0.12344 12.34%
        :param i:
        :return:
        '''
        return ''.join(('%.2f' % i, '%'))

    # 0.12345  ('12.35%', '87.66%')
    # 0.12344  ('12.34%', '87.66%')
    a, b = f(i * 100), f(100 - i * 100)
    if a[-2] == '5':
        # 0.12345  ('12.35%', '87.66%') -> ('12.35%', '87.65%')
        b = b[0:-2] + '5%'
    return a, b