For anyone looking up how to test if two variables actually point to the same memory address, use the is keyword. In the case of a python list, is also applies. Alternatively for lists, an element-wise (deep) comparison can be performed using the == operator.

Jun 19, 2019 · I am trying to understand how variables work in python. Say I have an object stored in the variable a: >>> a = [1, 2, 3] If I assign a to b, both point to the same object: >>> b = a >>> b is a True But if I reassign a or b, that's no longer true: >>> a = {'x': 'y'} >>> a is b False The two variables now have different values:

You can use package memory_graph to easily see whether two variables reference the same object: import memory_graph as mg # see link above for install instructions x = ['a', 'b', 'c'] y = x # x and y reference the same object z = ['a', 'b', 'c'] # x and z reference different objects mg.show(locals()) # show local variables in a graph

Feb 28, 2022 · And note that while mutations change objects (not variables), multiple variables can point to the same object. If two variables point to the same object changes to that object will be seen when accessing either variable (because they both point to the same object).

May 2, 2024 · Python's variables are not buckets that contain objects; they're pointers. Assignment statements don't copy: they point a variable to a value (and multiple variables can "point" to the same value).

May 25, 2023 · 1.3. Multiple reference variables pointing to the same object in Python. Let’s look at the example below. x = 5 y = x. We see that the variable x refers to the object of the int class storing the value 5. When executing the statement y = …

If you assign the same object to multiple variables, every one of those variables references (points to) the same object. They act like aliases for the object. When you reassign a variable, Python changes what object the variable references.

The == operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. In the vast majority of cases, this means you should use the equality operators == and != , …

When Multiple Variables Point to the Same Object. In Python, the assignment operator = binds a variable to an object. If you assign multiple variables to the same object, they reference the same memory address. This is true for immutable objects like …

Oct 8, 2015 · In python, I have declared two variables with same value. Strangely, they are pointing to same object. I need to understand how this objects and their corresponding values are assigned.