dataone = 8

print(id(dataone))

datatwo = 5

print(id(datatwo))

dataone = datatwo

print(dataone)

print(id(dataone))

print(dataone is datatwo)

结果

C:\Python27\python.exe D:/python_one/myfirst.py/mytest4.py

42689232

42689304

5

42689304

True

Process finished with exit code 0