tuples and cartesian coordinates

[Terry Reedy]

"Gerrit Holl" <gerrit at nl.linux.org> wrote in
message
news:mailman.262.1071692390.9307.python-list at python.org...
> Shouldn't coordinates be mutable?

Coordinates no, positions possibly yes, as long as
you avoid the mutiple reference trap others have
described.  My philosophy on the tuple vs. list
debate is that people should use what works for
their particular application.

TJR