Recursive method

[Gordon McMillan]

Ralph Gauges writes:

> ... (see code below). Unfortunately all I get is a
> 'NameError' for makenodes, when the function is supposed to
> call itself. 
...
> 
>  def makeTree():
>                 .
>                 .
>             def makenodes(C):
> 

The problem is the nested definition. The name "makenodes" is local 
to makeTree and makeTree's locals are not visible inside makenodes.

Unnest makenodes and it should work.

- Gordon