attributes

Python function attributes – uses and abuses

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Not many are aware of this feature, but Python’s functions (and methods) can have attributes. Behold: >>> def foo(x): … pass … >>> foo.score = 10 >>> dir(foo) ['__call__', '__class__', '__delattr__', '__dict__', '__doc__', '__get__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'func_closure', 'func_code', 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name', 'score'] >>> foo.score … Read more

Iterate over object attributes in python

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I have a python object with several attributes and methods. I want to iterate over object attributes. class my_python_obj(object): attr1='a' attr2='b' attr3='c' def method1(self, etc, etc): #Statements I want to generate a dictionary containing all of the objects attributes and their current values, but I want to do it in a dynamic way (so if … Read more

correct way to define class variables in Python

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I noticed that in Python, people initialize their class attributes in two different ways. The first way is like this: class MyClass: __element1 = 123 __element2 = "this is Africa" def __init__(self): #pass or something else The other style looks like: class MyClass: def __init__(self): self.__element1 = 123 self.__element2 = "this is Africa" Which is … Read more

Why can’t you add attributes to object in python?

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(Written in Python shell) >>> o = object() >>> o.test = 1 Traceback (most recent call last): File "<pyshell#45>", line 1, in <module> o.test = 1 AttributeError: 'object' object has no attribute 'test' >>> class test1: pass >>> t = test1() >>> t.test Traceback (most recent call last): File "<pyshell#50>", line 1, in <module> t.test … Read more