How to Calculate NPV?

ryguy7272 ryanshuell at
Wed Jul 29 16:21:22 CEST 2015

On Wednesday, July 29, 2015 at 9:59:10 AM UTC-4, ryguy7272 wrote:
> I am using Spyder Python 2.7.  I'm running this sample code.
> import scipy as sp
> cashflows=[50,40,20,10,50]
> npv=sp.npv(0.1,cashflows)
> round(npv,2)
> Now, I'm trying to get the NPV, and I don't see any obvious way to get it.  
> The author of the book that I'm reading gets 144.56.  I think that's wrong, but I don't know for sure, as Python won't do any calculation at all.  It's easy to enter code and run it, but I can't tell how to get Python to actually DO the calculation.
> Any idea what I'm doing wrong?
I don't know why the author didn't do that in the book.


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