Op Tuesday 28 Apr 2015 09:56 CEST schreef Ethan Furman: > On 04/28, Cecil Westerhof wrote: >> If I remember correctly you can not hide variables of a class or >> make them read-only? >> >> I want to rewrite my moving average to python. The init is: >> def __init__(self, length): >> if type(length) != int: >> raise ParameterError, 'Parameter has to be an int' >> if n < 0: >> raise ValueError, 'Parameter should be greater or equal 2' >> self.length = length >> self.old_values = [] >> self.current_total = 0 >> >> But when someone changes length, old_values, or current_total that >> would wreck havoc with my class instance. What is the best way to >> handle this? > > Prefix those names with a single leading underscore, which is the > convention for private variables.
Done. > This way, if some user (maybe you! ;) has a good reason to change > those values in can be done, but it is quite clear that said user is > mucking about with internals and they are on their own. There is something to say for this way of working. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof -- https://mail.python.org/mailman/listinfo/python-list
