tmval.Annuity.get_r_pmt¶

Annuity.get_r_pmt(gr: Union[tmval.growth.Accumulation, Callable, float, tmval.rate.Rate]) → float[source]¶

When inferring the number of payment periods, returns the number of payment periods as if fractional periods were allowed. This fractional value helps calculate the drop or balloon payments, if needed.

Parameters: gr (Accumulation, Callable, float, or Rate) – A growth rate object.
Returns: The number of payment periods.
Return type: float