Magic method __str__

[dan789]

@nilamo no, I don´t want to copy a list inside a function, all what I need is this function should work for changes in a list. For example, after __init__ (which creates a list self.tab) I want __str__() to create a string from this list. Using the code by @buran few posts above it works, but I need to call this method also later, after some changes in this self.tab happen. And these are specifically "." changed to a set. After this, method __str__() create a string consisting of numbers and sets, but I still want to put "." instead of sets here.