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Difference between copy and deepcopy in Python

(1) Copy immutable data type, whether copy or deepcopy, is the same address When the value of the shallow copy is an immutable object (numeric, string, tuple), as in the case of ="assignment," the id value of the object is the same as the original value of the shallow copy.

(2) The copied values are mutable objects (lists and dictionaries)

There are two types of shallow copy:

*** Cases: There are no complex sub-objects in the copied object, and the change of the original value does not affect the value of the shallow copy, and the change of the shallow copy value does not affect the original value. The id value of the original value is different from the value of the shallow copy original.

The second case: the copied object has complex sub-objects (for example, a sub-element in a list is a list). Changing the value of the complex sub-object in the original value will affect the value of the shallow copy.

Deep copy: Complete copy independence, including inner lists and dictionaries.

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