python basic class question, where am i going wrong
python classes and objects exercises
what is "self" typically used for in a python method within a class?
in python a function within a class definition is called a
what is instantiation in terms of oop terminology?
in object oriented programming, what is another name for the "attributes" of an object?
which of the following is rarely used in object oriented programming?
which of the following is required to create a new instance of the class?
I'm slowly trying to get my head around classes. I have a few working examples which i kinda understand but can someone please explain to me why this doesn’t work?
class python: def __init__(self,name): self.name=name def changename(self,newname): self.name=newname abc=python('python') print abc.name abc.changename = 'anaconda' print abc.name
All I’m trying to do here is change the value of
abc.name at some point later in the code (it doesn’t need to be name if that’s a special word, but I did try name2, etc, same results...)
If I do
print abc.changename then I get the output anaconda but that’s not really what i wanted.
Any help would be much appreciated.
Also...Is it possible to do something like that at a later point in the life cycle of the code?
def newstuff(self, value1, value2): self.newvalue1 = value1 self.newvalue2 = value2
So that I would have access to 2 new ‘things’
Does that make sense??
Sorry for the ‘things; I’m still trying to grasp which is an attribute, object, method, item, etc...
Try changing this line:
abc.changename = 'anaconda'
You defined the method
changename to access your member
name. Then, in the first line you try to access the member directly without using the method.
In the second case, yes it would work:
def newstuff(self, value1, value2): self.name1 = value1 self.name2 = value2
But you would have to add 1 member to your class, and should then access the method like this:
class python: def __init__(self, value1, value2): self.name1 = value1 self.name2 = value2 abc=python('python1', 'python2') abc.newstuff('snake', 'anaconda')
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abc.changename is a method. To use it, write it with the parenthesis and the value into them.
Hope it'll help you
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abc.changename as a function. Invoke it by using
What you did is you assigned a string to the member variable
abc.changename instead of the class method you defined eariler.
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- Does this answer your question? Python changing variable values declared in __init__
abc.changenameis a method. Why are you assigning a string to it:
abc.changename = 'anaconda'? Also, while you're just starting learning Python, switch to Python 3.x as Python 2 will stop receiving updates in 2020
- Change abc.changename = 'anaconda' to abc.changename('anaconda'). changename is a function, not a variable, and has to be treated accordingly. :)
- Not just in 2020; support ends once 2020 begins. That's in less than 19 days.