On 06/20/2015 06:54 PM, Eric Snow wrote:
Also note that Barry has a (rejected) PEP from a number of years ago about freezing objects... That idea is likely out of scope as relates to my proposal, but it certainly factors in the problem space.
How about instead of freezing, just modify a flag or counter if it's mutated. That could be turned off by default. Then have a way to turn on an ObjectMutated warning or exception if any objects is modified within a routine, code block. or function. With something like that, small parts of python can be tested and made less mutable in small sections at a time. Possibly working from the inside out. It doesn't force immutability but instead asks for it. A small but not quite so impossible step. (?) Cheers, Ron