[Zope] Float object not callable (newbie question)

Fri May 13 11:06:13 EDT 2005

hi all,
I'm trying to write a simple app which takes a name, bank balance,
interest rate and returns the balance once 1 years interest has been
added. I'm getting the error that float object is not callable. 
i can't figure out where i'm going wrong :S

my code is below(getDetails, showDetails,doStuff.py), thanks for any
input!
paul.

<html>
<body>

<form action="showDetails" method=post>
 <input name="name:str"> NAME<br>
 <input name="balance:float"> BALANCE<br>
 <input name="interestRate:float"> INTEREST RATE<br>
 <input type="submit" value="calculate">
</form>

</body>
</html>
------------------
<html>
<body>

<span tal:define="name request/name;
                  balance request/balance;
                  rate request/interestRate">
 <span tal:content="python: here.doStuff(name,balance,rate)"></span>
</span>

</body>
</html>
--------------
years = 1
newBal = balance( balance*(rate*years))

returnList = [name,newBal]

return returnList