1.4 KiB
1.4 KiB
title | localeTitle |
---|---|
Python Idobject | Python Idobject |
id()
是Python 3中的内置函数,它返回对象的_标识_ 。 _标识_是该对象在其生命周期内的唯一整数。这也是内存中对象的地址。
论据
目的
object
参数通常可以是int
, float
, str
, list
, dict
, tuple
等。
代码示例
a = 2
print(id(a)) #=> 140454723286976 (Values returned by id() might be different for different users)
b = 3
print(id(b)) #=> 140454723287008
c = 2
print(id(c)) #=> 140454723286976 (This is same as id(a) since they both contain the same value and hence have same memory address)
print(id(a) == id(b)) #=> False (since a and b have different values stored in them)
print(id(a) == id(c)) #=> True (since a and c have same values stored in them)
d = 1.1
e = 1.1
print(id(d) == id(e)) #=> True (since d and e have same values stored in them)
str1 = 'hello'
str2 = 'hello'
print(id(str1) == id(str2)) #=> True (since str1 and str2 have same values stored in them)
# For complex objects like lists, tuples, dictionaries etc. id() would give a unique integer even if the content of those containers is same.
tup1 = (1,1)
tup2 = (1,1)
print(id(tup1) == id(tup2)) #=> False