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, 1259🔥, 0💬
Popular Posts:
How To Pass Arrays By References? in PHP? Like normal variables, you can pass an array by reference ...
What is Azure API Management Publisher Dashboard? Azure API Management Publisher Dashboard is an Azu...
How to use the "set-body" Policy Statement for an Azure API service operation? The "set-body" Policy...
How to start Visual Studio Command Prompt? I have Visual Studio 2017 Community version with Visual C...
How to login to Azure API Management Publisher Dashboard? If you have given access permission to an ...