CODEWITHSUNDEEP
python
Janbure
Janbure

Reputation: 79

Custom class with recursion in methods, global name not defined

I'm trying to implement a method for which is necessary to use recursion, but every time, I get the global name not defined error My class look like this:

class MyClass(object):
    def _init_(self, name=None, content=None):
        self.name = name
        self.content = content

It's a node class, name it's just a text string and content a list of it's children (they are nodes too), is initialized as None but the construction function that builds the tree give them a blank list if they have no children. The class works fine and so does the function but if I try to add recurtion to methods they just don't work, even if they work just fine as a standalone function, i.e.:

def get_nodes(self):
    c = [] 
    c.append(self.name)
    if self.content != []:
        for a in self.content:
            c.extend(get_nodes(a))
    return c

I know this is possible, what am I doing wrong?

Upvotes: 2

Views: 898

Answers (1)

BrenBarn
BrenBarn

Reputation: 251448

You need to do a.get_nodes().

Also the initialization method is called __init__, not _init_ (two underscores on both ends).

Edit: If you won't show your code, we can't tell you what's wrong with your code. This code works for me:

class MyClass(object):
    def __init__(self, name=None, content=None):
        self.name = name
        self.content = content
    def get_nodes(self):
        c = [] 
        c.append(self.name)
        if self.content != []:
            for a in self.content:
                c.extend(a.get_nodes())
        return c

>>> n = MyClass('me', [])
>>> m = MyClass('other', [n])
>>> m.get_nodes()
['other', 'me']

If your code doesn't work then you have to explain how your code is different from that.

Upvotes: 4

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