Python id() Function : Design Patterns In Python

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Documentation : https://sbcode.net/python/prototype/#python-id-function

The Python id() function returns the memory address of an object.

All objects in Python will have a memory address, even un-instantiated classes.

You can test if an object is unique in Python by comparing its ID.

In the examples above, I can tell how deep the copies of the dictionaries and lists were, because the IDs of the inner items will be different. I.e., they point to different memory identifiers.

Note that every time you start a Python process, the IDs assigned at runtime will likely be different.

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