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.
Solution
The eight different objects in memory after the code execution are as follows:
- The list
witself, which is a list object containing two elements. - The integer
1, which is an element of the listw. - The integer
2, which is also an element of the listw. - The
copyof the listw, which is another list object created bycopy.copy(w). - The
deepcopyof the listw, which is yet another list object created bycopy.deepcopy(w). - The integer
1in the copied list, which is a separate object from the integer1in the original listwbecause of the deep copy. - The integer
2in the copied list, which is a separate object from the integer2in the original listwbecause of the deep copy. - The list
zitself, which is a reference to the listwafter the assignmentz = 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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