financial.py 文件源码

def _convert_when(when):
    #Test to see if when has already been converted to ndarray
    #This will happen if one function calls another, for example ppmt
    if isinstance(when, np.ndarray):
        return when
    try:
        return _when_to_num[when]
    except (KeyError, TypeError):
        return [_when_to_num[x] for x in when]