python basic class question, where am i going wrong

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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’ abc.newvalue1 and abc.newvalue2.

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'

to this:

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. abc.changename('anaconda') Hope it'll help you

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You declared abc.changename as a function. Invoke it by using abc.changename("Sandman112")

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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Comments
  • Does this answer your question? Python changing variable values declared in __init__
  • abc.changename is 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.