André,

On 01.08.07, Andre Wobst wrote:
> 
> So let me formulate a rule of thumb: Go for option 1 for all
> attributes, which are not read-only. (For read-only attribute *no*
> copy is necessary and should not be made.)

As it is easily possible in Python to overwrite data in instances
(also ones that are not "self"), it is sometimes hard to see what is
read-only. Especially in the graph module, complex use of foreign data
is made -- can I rely on the assumption that foreign data is used
read-only?

Michael.

-- 
Michael Schindler
  Laboratoire de Physico-Chimie Théorique.
  ESPCI. 10 rue Vauquelin, 75231 Paris cedex 05, France.
  Tel: +33 (0)1 40 79 45 97    Fax: +33 (0)1 40 79 47 31
  http:  www.pct.espci.fr/~michael

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