On Sat, Aug 23, 2014 at 3:07 PM, Seymore4Head <Seymore4Head@hotmail.invalid> wrote: > On Sat, 23 Aug 2014 14:21:03 -0400, Joel Goldstick > <joel.goldst...@gmail.com> wrote: > >>On Sat, Aug 23, 2014 at 1:47 PM, Seymore4Head >><Seymore4Head@hotmail.invalid> wrote: >>> I am trying to do this example: >>> http://openbookproject.net/pybiblio/practice/wilson/loan.php >>> The instructions warn that floating point math can get messy so I >>> cheated a little bit to get me going. >>> >>> I made my program work by using numbers that wouldn't get messy. >>> Instead of using 6% interest I used 10 and instead of using 12 months, >>> I used 10. >>> >>> I managed to get it working and formatted just like they wanted it, >>> but now I want to try to use any numbers. It has been hard to figure >>> out which method to use. >>> >>You need to learn about string formatting. Here is a good link: >>http://mkaz.com/2012/10/10/python-string-format/ >> > Thanks. I will give that a try. > >>> Here is the working program. >>> >>> import sys >>> count = 0 >>> payment = 0 >>> borrowed = 100 >>> rate = 10 >>> term = 10 >>> interest=borrowed*rate*.01 #(*1) >>> balance = borrowed + interest >>> print ("Loan calculator") >>> print ("") >>> print ("Amount borrowed: ", borrowed) >>> print ("Interest rate: ", rate) >>> print ("Term: (months)", term) >>> print ("") >>> print ("Amount borrowed:" , borrowed) >>> print ("Total interest paid:" , interest) >>> print ("") >>> print ("") >>> print (" Amount Remaining") >>> print ("Pymt# Paid Balance") >>> print ("----- ------ ----------") >>> while count <=term: >>> >>> >>> print (repr(count).rjust(3), repr(payment).rjust(13), >>> repr(balance).rjust(14)) >>> >>> >>I don't understand why you are using repr(..) It is not necessary. >> > Would you please change the line to something you feel that is more > appropriate? That was the first command I stumbled on that I could > use to get the column spacing correctly. > I have contacted my local library to get a couple of books on Python, > but at the moment all I have is the web. > > Funny, I though using the web would be better than a book. I don't > think so anymore. Using the web, it is hard to find square one > tutorial text. >
You should go to python.org and take a look at the tutorial. There are lots of references to other sites there as well > >>> payment = (borrowed + interest)/term >>> balance = balance - payment >>> count = count + 1 >>> >>> What should I use to make the formatting come out correctly when the >>> program prints "payment" and "balance" using decimal format? >>> >>> If you change the "rate" from 10 to 6 and the "term" from 10 to 12, >>> the screen gets very messy. >>> >>> Anyone care to suggest what method to use to fix the decimal format? >>> -- >>> https://mail.python.org/mailman/listinfo/python-list > > I would rather just use Usenet for the moment. Until the group gets > tired of nursing the rookie. > -- > https://mail.python.org/mailman/listinfo/python-list -- Joel Goldstick http://joelgoldstick.com -- https://mail.python.org/mailman/listinfo/python-list
