Python计算利率的问题，写了很多次，还是不对，不知道该怎么写了
把问题贴出来，或者看看这个https://blog.csdn.net/haohulala/article/details/105408381?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166497684416782391846137%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=166497684416782391846137&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-13-105408381-null-null.142^v51^control,201^v3^add_ask&utm_term=Python%E8%AE%A1%E7%AE%97%E5%88%A9%E7%8E%87%E7%9A%84%E9%97%AE%E9%A2%98&spm=1018.2226.3001.4449