Nikolaus Rath schrieb:
Hello,
I am really surprised that I am asking this question on the mailing
list, but I really couldn't find it on python.org/doc.
Why is there no proper way to protect an instance variable from access
in derived classes?
I can perfectly understand the philosophy behind not protecting them
from access in external code ("protection by convention"), but isn't
it a major design flaw that when designing a derived class I first
have to study the base classes source code? Otherwise I may always
accidentally overwrite an instance variable used by the base class...
Here we go again...
http://groups.google.com/group/comp.lang.python/browse_thread/thread/188467d724b48b32/
To directly answer your question: that's what the __ (double underscore)
name mangling is for.
Diez
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