Why no warnings when re-assigning builtin names?

[Ethan Furman]

Philip Semanchuk wrote:
> I think Python does lots of beneficial hand-holding. Garbage collection
 > is a good example. $DIETY knows, people have been struggling with manual
 > memory management in C and its ilk for a long time. Even though there
 > are good tools to help, memory leaks still happen. Python increases our
 > productivity by allowing us to forget about manual memory management
 > altogether. I can do it with tools like valgrind, but Python's makes
 > the point moot. Is that hand-holding? If so, I'm all for it.

Good point.  There is an important difference, however, between offering 
warnings to newbie programmers (which is how this thread started), and 
memory management.

~Ethan~