Tools, FAQ, Tutorials:
'list' Values are Objects
Are "list" values objects in Python?
✍: FYIcenter.com
Yes, "list" values are objects in Python.
In fact, all data values in Python are objects.
In Python, "list" is defined as an object class with the following interesting properties, constructors, and methods:
list.__doc__ - Property holding a short description of "list" objects.
list.__new__() - Constructor returning a "list" object. It can be invoked as list(). For example:
>>> list.__new__(list)
[]
>>> list()
[]
>>> list(("Age", 25))
['Age', 25]
>>> list(["Age", 25])
['Age', 25]
>>> list("FYIcenter.com")
['F', 'Y', 'I', 'c', 'e', 'n', 't', 'e', 'r', '.', 'c', 'o', 'm']
list.__getitem__() - Instance method for the [] operation, returning item of the list at the given position. For example:
>>> ['Age', 25].__getitem__(1) 25 >>> ['Age', 25][1] 25 >>> (['Age', 25])[1] 25
list.__len__() - Instance method returning the number of items in the list. It can be invoked as len(list). For example:
>>> ['Age', 25].__len__() 2 >>> len(['Age', 25]) 2
list.__sizeof__() - Instance method returning the size of the list in memory, in bytes. For example:
>>> ['Age', 25].__sizeof__() 28 >>> [].__sizeof__() 20
list.append() - Instance method appending a new value to the end of the list. For example:
>>> a = ['Age', 25] >>> a.append(["Name","Joe"]) >>> a ['Age', 25, ['Name', 'Joe']] >>>
You can use the dir(list) function to see all members of the "list" class:
>>> dir(list) ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__' , '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__' , '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__r educe__', '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__' , '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort ']
2022-12-03, ∼2314🔥, 0💬
Popular Posts:
What is Azure API Management Publisher Dashboard? Azure API Management Publisher Dashboard is an Azu...
How To Protect Special Characters in Query String in PHP? If you want to include special characters ...
How to use the "@(...)" expression in Azure API Policy? The "@(...)" expression in Azure API Policy ...
How to run PowerShell Commands in Dockerfile to change Windows Docker images? When building a new Wi...
How to convert a JSON text string to an XML document with PHP language? Currently, there is no built...