Introduction I have built several production web applications using React and Redux and generally have had an excellent experience with those technologies. One of React’s greatest assets IMO is it’s ability to integrate into all kinds of stacks and setups but still play nice with the other kids. That was something that impressed me back in Spring 2014 when I first used React. We got React running in the jQuery spaghetti code of a massive, legacy Ruby on Rails application with incredibly little effort and huge productivity benefits to the team.

Not all python objects handle changes the same way. Some objects are mutable, meaning they can be altered. Others are immutable; they cannot be changed but rather return new objects when attempting to update. What does this mean when writing python code? This post will talk about (a) the mutability of common data types and (b) instances where mutability matters. Mutability of Common Types The following are some immutable objects: