41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
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---
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title: Python Idobject
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---
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`id()` is a built-in function in Python 3, which returns the _identity_ of an object. The _identity_ is a unique integer for that object during its lifetime. This is also the address of the object in memory.
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## Argument
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#### object
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The `object` argument can typically be a `int`,`float`,`str`,`list`,`dict`,`tuple` etc.
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## Code Sample
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a = 2
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print(id(a)) #=> 140454723286976 (Values returned by id() might be different for different users)
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b = 3
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print(id(b)) #=> 140454723287008
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c = 2
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print(id(c)) #=> 140454723286976 (This is same as id(a) since they both contain the same value and hence have same memory address)
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print(id(a) == id(b)) #=> False (since a and b have different values stored in them)
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print(id(a) == id(c)) #=> True (since a and c have same values stored in them)
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d = 1.1
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e = 1.1
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print(id(d) == id(e)) #=> True (since d and e have same values stored in them)
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str1 = 'hello'
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str2 = 'hello'
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print(id(str1) == id(str2)) #=> True (since str1 and str2 have same values stored in them)
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# For complex objects like lists, tuples, dictionaries etc. id() would give a unique integer even if the content of those containers is same.
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tup1 = (1,1)
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tup2 = (1,1)
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print(id(tup1) == id(tup2)) #=> False
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 <a href='https://repl.it/CQw7/1' target='_blank' rel='nofollow'>Run Code</a>
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<a href='https://docs.python.org/3/library/functions.html#id' target='_blank' rel='nofollow'>Official Docs</a>
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