[Tutor] redefining builtin function

[Christopher Smith]

Hi list,

I am trying to redefine a built in function.  I can do the following in
the 
interactive window but not in a script.  Can anyone help me with the
script?

>>> from math import floor, log10
>>> def round(x,n=0):
...  if n%1==0:
...   return __builtins__.round(x,n)
...  return __builtins__.round(x,int(10*n)-1-floor(log10(abs(x))))
... 
>>> print round(1.234567,2)
1.23
>>> print round(1.234567,0.2)
1.2
>>>

When I do the same thing in a script I get an "attribute error" so
apparently I am 
working with a different namespace.  Is there a way to make sure that I
can get 
access to the global _builtins__.round no matter where round is defined?

/c