/Program Files
    /Python
        /2.6
            python.exe and everything else
        /3.0
            python.exe and everything else

print "platform.name="+ "Jython " + version

print("platform.name="+ "Jython " + version)

def fib(n):    # write Fibonacci series up to n
     """Print a Fibonacci series up to n."""
     a, b = 0, 1
     while b < n:
         print (b, end=' ')
         a, b = b, a+b

fib(2000)

Internal parser error
"no viable alternative at input'=' "