In message <[email protected]>, Robert Kern wrote:
> On 11/4/10 2:07 AM, Lawrence D'Oliveiro wrote: > >> In message<[email protected]>, Robert >> Kern wrote: >> >>> On 11/2/10 2:12 AM, Lawrence D'Oliveiro wrote: >>> >>>> In message<[email protected]>, Robert >>>> Kern wrote: >>>> >>>>> "Immutable objects" are just those without an obvious API for >>>>> modifying them. >>>> >>>> They are ones with NO legal language constructs for modifying them. >>>> Hint: if a selector of some part of such an object were to occur on the >>>> LHS of an assignment, and that would raise an error, then the object is >>>> immutable. The interpreter already knows all this. >>> >>> Incorrect. RHS method calls can often modify objects. >> >> So bloody what? > > So examining LHS "selectors" is not sufficient for determining > immutability. Yes it is. All your attempts at counterexamples showed is that it is not necessary, not that it is not sufficient. -- http://mail.python.org/mailman/listinfo/python-list
