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# Python2.x Python id() Function [ Python Built-in Functions](#) * * * ## Description The **id()** function returns a unique identifier for an object, which is an integer. In CPython, the **id()** function is used to obtain the memory address of an object. ## Syntax id syntax: id() Parameter explanation: * object -- The object. ## Return Value Returns the memory address of the object. ## Example The following example demonstrates the usage of id: >>>a = 'tutorial'>>>id(a)4531887632>>>b = 1>>>id(b)140588731085608 [ Python Built-in Functions](#)