I got my game to work but I when I run it and answer the first question it says

Question

I got my game to work but I when I run it and answer the first question it says Could not save.
Why is my game not saving.
It does create the save game file but it is always empty.
Please fix the error

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# 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 + "? "    else:    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!!!"    return # 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    try:    f = file('questor.dat', 'r')    topNode = pickle.load(f)    f.close()    except:    topNode = Qnode('python')
   done = 0    while not done:    try:    f = file('questor.dat', 'w')    pickle.dump(topNode, f)    f.close()    except:    print "Could not save!" # 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    print    done = not yesno("Do another? ")    #print
# immediate-mode commands, for drag-and-drop or execfile() execution if __name__ == '__main__':    run()    print    raw_input("press Return>") else:    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
# 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 + "? "    else:    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!!!"    return # 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    try:    f = file('questor.dat', 'r')    topNode = pickle.load(f)    f.close()    except:    topNode = Qnode('python')
   done = 0    while not done:    try:    f = file('questor.dat', 'w')    pickle.dump(topNode, f)    f.close()    except:    print "Could not save!" # 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    print    done = not yesno("Do another? ")    #print
# immediate-mode commands, for drag-and-drop or execfile() execution if __name__ == '__main__':    run()    print    raw_input("press Return>") else:    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
# 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 + "? "    else:    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!!!"    return # 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    try:    f = file('questor.dat', 'r')    topNode = pickle.load(f)    f.close()    except:    topNode = Qnode('python')
   done = 0    while not done:    try:    f = file('questor.dat', 'w')    pickle.dump(topNode, f)    f.close()    except:    print "Could not save!" # 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    print    done = not yesno("Do another? ")    #print
# immediate-mode commands, for drag-and-drop or execfile() execution if __name__ == '__main__':    run()    print    raw_input("press Return>") else:    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

Explanation / Answer

to my knowledge i think the code is correct.. still i have tried something and i get any more problem i will reply soon rate me for my small help # 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 + "? " else: 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!!!" return # 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 try: f = file('questor.dat', 'r') topNode = pickle.load(f) f.close() except: topNode = Qnode('python') done = 0 while not done: try: f = file('questor.dat', 'w') pickle.dump(topNode, f) f.close() except: print "Could not save!" # 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 print done = not yesno("Do another? ") #print # immediate-mode commands, for drag-and-drop or execfile() execution if __name__ == '__main__': run() print raw_input("press Return>") else: 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

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