I'm just trying to come thru with a passing grade at this point because there was no instruction. I can't even get the program that was given to me to work, even though I copied it verbatim from the text. Please help me figure out what the error is so I can try to finish the assignment. Thanks in advance.

Here is the assignment:

3. Find a way to improve the program below to save the input data and load it back in so that the program doesn't get amnesia every time you quit. Run and debug your improved program.

This is a Python program which has a class and other features. In this script, you think of an item, and the computer tries to guess it. When it is wrong, you teach it about your new item. After a few dozen games, it starts to get pretty smart!

Here is the code:

# questor.py

# define some constants for future use

kQuestion = 'question'
kGuess = 'guess'

# define a function for asking yes/no questions
def yesno(prompt):
    ans = raw_input(prompt)
    return (ans[0]=='y' or ans[0]=='Y')

# define a node in the question tree (either question or guess)
class Qnode:

# initialization method
    def __init__(self,guess):
        self.nodetype = kGuess
        self.desc = guess

# get the question to ask
def query(self):
    if (self.nodetype == kQuestion):
        return self.desc + " "
    elif (self.nodetype == kGuess):
        return "Is it a " + self.desc + "? "
        return "Error: invalid node type!"

# return new node, given a boolean response
def nextnode(self,answer):
    return self.nodes[answer]

# turn a guess node into a question node and add new item
# give a question, the new item, and the answer for that item
def makeQuest( self, question, newitem, newanswer ):

# create new nodes for the new answer and old answer
    newAnsNode = Qnode(newitem)
    oldAnsNode = Qnode(self.desc)

# turn this node into a question node
self.nodetype = kQuestion
self.desc = question

# assign the yes and no nodes appropriately
self.nodes = {newanswer:newAnsNode, not newanswer:oldAnsNode}

def traverse(fromNode):
# ask the question
    yes = yesno( fromNode.query() )

# if this is a guess node, then did we get it right?
    if (fromNode.nodetype == kGuess):
        if (yes):
            print "I'm a genius!!!"
# if we didn't get it right, return the node
        return fromNode

# if it's a question node, then ask another question
        return traverse( fromNode.nextnode(yes) )

def run():
    # start with a single guess node
    topNode = Qnode('python')

done = 0
while not done:
    # ask questions till we get to the end
    result = traverse( topNode )

# if result is a node, we need to add a question
if (result):
    item = raw_input("OK, what were you thinking of? ")
    print "Enter a question that distinguishes a",
    print item, "from a", result.desc + ":"
    q = raw_input()
    ans = yesno("What is the answer for " + item + "? ")
    result.makeQuest( q, item, ans )
    print "Got it."

# repeat until done
done = not yesno("Do another? ")

# immediate-mode commands, for drag-and-drop or execfile() execution
if __name__ == '__main__':
    print raw_input("press Return>")
        print "Module questor imported."
        print "To run, type: questor.run()"
        print "To reload after changes to the source, type: reload(questor)"

# end of questor.py

Here is the error:

Traceback (most recent call last):
  File "C:/Users/Tony/Documents/Module 4 SLP/questor", line 43, in <module>
    self.nodetype = kQuestion
NameError: name 'self' is not defined

Thanks again for the help

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