在c++中參數傳遞有兩種形式：值傳遞和引用傳遞。這兩種方式的區別我不在此說，自行補上，如果你不知道的話。我先上python代碼，看完我們總結一下，代碼如下：

# copy module import
import copy

# number and string
a = 12
a1 = a
a2 = copy.copy(a)
a3 = copy.deepcopy(a)
# look addr
print("==========number=======")
print(id(a))
print(id(a1))
print(id(a2))
print(id(a3))

s = ‘12345‘
s1 = s
s2 = copy.copy(s)
s3 = copy.deepcopy(s)
# look addr
print("==========String=======")
print(id(s))
print(id(s1))
print(id(s2))
print(id(s3))

# others
target = {
    ‘name‘: ‘ckmike‘,
    ‘age‘: 25,
    ‘boxes‘:[
        ‘LV‘,
        ‘Prada‘,
        ‘KUQI‘
    ]
}
target1 = target
target2 = copy.copy(target)
target3 = copy.deepcopy(target)
print("==========dict-1=======")
print(id(target))
print(id(target1))
print(id(target2))
print(id(target3))
print("==========dict-2=======")
print(id(target[‘boxes‘]))
print(id(target1[‘boxes‘]))
print(id(target2[‘boxes‘]))
print(id(target3[‘boxes‘]))
 

輸出結果：
==========number=======
10943360
10943360
10943360
10943360
==========String=======
140567123944648
140567123944648
140567123944648
140567123944648
==========dict-1=======
140567124625088
140567124625088
140567124625160
140567123938760
==========dict-2=======
140567099339272
140567099339272
140567099339272
140567099339464

總結：
對於數值、字符串而言，不管是賦值符號還是淺拷貝、深拷貝，都是引用的內存中的同一份值，變量指向同一地址。

具體深淺拷貝，可以查看模塊copy中的copy和deepcopy源碼

我要學python之深淺拷貝原理