赋值、浅拷贝、深拷贝

Author: progzc

exercise/assign_test.py

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+# 变量的赋值
+
+class CPU:
+    pass
+
+
+class Disk:
+    pass
+
+
+class Computer:
+    def __init__(self, cpu, disk):
+        self.cpu = cpu
+        self.disk = disk
+
+
+# 变量的赋值操作，只是形成两个变量，实际上还是指向同一个对象
+cpu1 = CPU()
+cpu2 = cpu1
+print(cpu1)
+print(id(cpu1))
+print(cpu2)
+print(id(cpu2))

exercise/deep_copy_test.py

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+import copy
+
+
+# 深拷贝
+class CPU:
+    pass
+
+
+class Disk:
+    pass
+
+
+class Computer:
+    def __init__(self, cpu, disk):
+        self.cpu = cpu
+        self.disk = disk
+
+
+cpu = CPU()
+disk = Disk()
+computer = Computer(cpu, disk)
+# 深拷贝：不仅拷贝源对象，也递归拷贝子对象
+computer2 = copy.deepcopy(computer)
+print(computer, computer.cpu, computer.disk)
+print(computer2, computer2.cpu, computer2.disk)

exercise/exercise.assets/Snipaste_2021-06-06_22-14-38.jpg

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+import copy
+
+
+# 浅拷贝
+class CPU:
+    pass
+
+
+class Disk:
+    pass
+
+
+class Computer:
+    def __init__(self, cpu, disk):
+        self.cpu = cpu
+        self.disk = disk
+
+
+cpu = CPU()
+disk = Disk()
+computer = Computer(cpu, disk)
+# 浅拷贝：只拷贝源对象，不拷贝子对象
+computer2 = copy.copy(computer)
+print(computer, computer.cpu, computer.disk)
+print(computer2, computer2.cpu, computer2.disk)