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, 1219🔥, 0💬
Popular Posts:
How To Read Data from Keyboard (Standard Input) in PHP? If you want to read data from the standard i...
How to add images to my EPUB books Images can be added into book content using the XHTML "img" eleme...
How To Set session.gc_divisor Properly in PHP? As you know that session.gc_divisor is the frequency ...
Where to find tutorials on PHP language? I want to know how to learn PHP. Here is a large collection...
How to add request query string Parameters to my Azure API operation to make it more user friendly? ...