Marshall schrieb: > immutable = can't change > vary-able = can change > > Clearly a contradiction in terms.
Not in mathematics. The understanding there is that a "variable" varies - not over time, but according to the whim of the usage. (E.g. if a function is displayed in a graph, the parameter varies along the X axis. If it's used within a term, the parameter varies depending on how it's used. Etc.) Similarly for computer programs. Of course, if values are immutable, the value associated with a parameter name cannot vary within the same invocation - but it can still vary from one invocation to the next. Regards, Jo -- http://mail.python.org/mailman/listinfo/python-list
