Python Variables Don't Store Values — They Reference Objects

A technical explainer on DEV Community highlights a common misconception beginners hold about how Python handles variable assignment. When a programmer writes x = 10, Python first creates the integer object 10 and then binds the name x to that object, rather than storing the value inside the variable itself. This means that writing y = x does not copy the value but instead makes both names point to the same object in memory. Similarly, reassigning x = 20 does not overwrite the original object but simply rebinds the name x to a new object, leaving the original intact. Understanding this name-binding model is foundational to explaining Python behaviors such as shared list references, the difference between is and ==, and how function arguments are passed.