In programming languages like C and Java, the concept of a variable is related to a memory location. Hence, often a variable is defined as a named memory location. Let us visualize this with an example, say we have the equation
int a = 1;
a = 2;
int b = a;
This creates another memory box as follows:
This is basically how other programming languages visualize variables. We can simply say that the "memory location" is emphasized which contains a "value". However, Python views variables as "tags" which are referenced (or tied) to some "value" (or object).
Let us visualize the above examples once again, say we have the equation
a = 1
a = 2
In this case, the tag is simply changed to the new value, and the previous value (now unreferenced) is removed by the garbage collector:
Let us now store the value of this variable into another
b = a
So to conclude, other languages have variables, while Python has 'tags' to represent the values (or objects). This method allows Python to utilize memory efficiently, and this visualization helps in understanding variables in Python.