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Consider the following code. Assume that copy has been imported.w = [1, 2]z = copy.copy(w)z = copy.deepcopy(w)print(z + w)z = wwhy there are 8 different objects exist in the computer’s memory after the code has been executed.Assume that no optimizations have been performed and that garbage collection has not been executed.

Question

Consider the following code. Assume that copy has been imported.w = [1, 2]z = copy.copy(w)z = copy.deepcopy(w)print(z + w)z = wwhy there are 8 different objects exist in the computer’s memory after the code has been executed.Assume that no optimizations have been performed and that garbage collection has not been executed.

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Solution

The eight different objects in memory after the code execution are as follows:

  1. The list w itself, which is a list object containing two elements.
  2. The integer 1, which is an element of the list w.
  3. The integer 2, which is also an element of the list w.
  4. The copy of the list w, which is another list object created by copy.copy(w).
  5. The deepcopy of the list w, which is yet another list object created by copy.deepcopy(w).
  6. The integer 1 in the copied list, which is a separate object from the integer 1 in the original list w because of the deep copy.
  7. The integer 2 in the copied list, which is a separate object from the integer 2 in the original list w because of the deep copy.
  8. The list z itself, which is a reference to the list w after the assignment z = w.

So, even though some of these objects contain the same values, they are distinct objects in the computer's memory.

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