Are routine objects guaranteed mutable & with dictionary?

[Terry Reedy]

Alf P. Steinbach wrote:
  > The question is what guarantees or absence thereof the language
> specification, PEPs, intentions, whatever gives/has.

The two docs backed up by PEPs. I suppose the docs could be clearer.
5.3.1 says "The primary must evaluate to an object of a type that 
supports attribute references, which most objects do." This is true for 
attribute access, but not for attribute setting. See

http://bugs.python.org/issue7436

for my suggest addition.

>> BTW, it's a function, not a "routine"
> 
> Wikipedia is your friend, <url: http://en.wikipedia.org/wiki/Subroutine>.

which says "the C and C++ programming languages, subprograms are 
referred to as "functions" (or "methods" when associated with a class)."
The same is true for Python and many other languages. Some languages 
have separate statements for defining functions and (non-function) 
subroutines. If you want to be understood, use function. I thought you 
mean 'routine' as opposed to 'special'.

Terry Jan Reedy