Tools, FAQ, Tutorials:
'dict' Values are Objects
Are "dict" values objects in Python?
✍: FYIcenter.com
Yes, "dict" values are objects in Python.
In fact, all data values in Python are objects.
In Python, "dict" is defined as an object class with the following interesting properties, constructors, and methods:
dict.__doc__ - Property holding a short description of "dict" objects.
dict.__new__() - Constructor returning a "dict" object. It can be invoked as dict(). For example:
>>> dict.__new__(dict)
{}
>>> dict()
{}
>>> dict({"Name":"Joe", "Age":25})
{'Name': 'Joe', 'Age': 25}
>>> dict(Name="Joe", Age=25)
{'Name': 'Joe', 'Age': 25}
dict.__getitem__() - Instance method for the [] operation, returning item of the dictionary with the given name. For example:
>>> {"Name":"Joe", "Age":25}.__getitem__("Age")
25
>>> {"Name":"Joe", "Age":25}["Age"]
25
dict.__len__() - Instance method returning the number name value pairs in the dictionary. It can be invoked as len(dict). For example:
>>> {"Name":"Joe", "Age":25}.__len__()
2
>>> len({"Name":"Joe", "Age":25})
2
dict.keys() - Instance method returning a new "dict_keys" object representing a list of key names in the dictionary. For example:
>>> {"Name":"Joe", "Age":25}.keys()
dict_keys(['Name', 'Age'])
>>> type({"Name":"Joe", "Age":25}.keys())
<class 'dict_keys'>
You can use the dir(dict) function to see all members of the "dict" class:
>>> dir(dict) ['__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__' , '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', ' __lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__seta ttr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'clear', 'co py', 'fromkeys', 'get', 'items', 'keys', 'pop', 'popitem', 'setdefault', 'update ', 'values']
⇒ Expressions, Variables and Assignment Statements
2023-07-01, ∼1993🔥, 0💬
Popular Posts:
How to build a test service operation to dump everything from the "context.Request" object in the re...
What is Azure API Management Gateway? Azure API Management Gateway is the Azure Web server that serv...
How To Move Uploaded Files To Permanent Directory in PHP? PHP stores uploaded files in a temporary d...
How to create a "Sign-up or Sign-in" user flow policy in my Azure AD B2C directory? If you want to b...
What is EPUB 3.0 Metadata "dc:publisher" and "dc:rights" elements? EPUB 3.0 Metadata "dc:publisher" ...