Struggling with basics

Peter peter at commonlawgov.org
Sun Sep 25 22:53:12 CEST 2005


Peter wrote:

>Jason wrote:
>
>  
>
>>A week ago I posted a simple little hi-score routine that I was using to 
>>learn Python.
>>
>>I've only just managed to examine the code, and the responses that 
>>people gave, and I'm now seriously struggling to understand why things 
>>aren't working correctly.
>>
>>At present my code is as follows...
>>
>>import random
>>import bisect
>>
>>class HiScores:
>>    def __init__(self,hiScores):
>>        self.hiScores=[entry for entry in hiScores]
>>
>>    def showScores(self):
>>        for score,name in self.hiScores:
>>            score=str(score).zfill(5)
>>            print "%s - %s" % name,score
>>
>>
>>    def addScore(self,score,name):
>>        score.zfill(5)
>>        bisect.insort(self.hiScores,(score,name))
>>        if len(self.hiScores)==6:
>>            self.hiScores.pop()
>>
>>    def lastScore(self):
>>        return self.hiScores[-1][0]
>>
>>def main():
>>
>>hiScores=[('10000','Alpha'),('07500','Beta'),('05000','Gamma'),('02500','Delta'),('00000','Epsilon')] 
>>
>>    a=HiScores(hiScores)
>>    print "Original Scores\n---------------"
>>    a.showScores()
>>
>>    while 1:
>>        newScore=str(random.randint(0,10000))
>>        if newScore  > a.lastScore():
>>            print "Congratulations, you scored %s " % newScore
>>            name=raw_input("Please enter your name :")
>>            a.addScore(newScore,name)
>>            a.showScores()
>>
>>if __name__=="__main__":
>>    main()
>>
>>
>>My first problem (lack of understanding of course) is that if I run the 
>>above, I get an error saying:
>>
>>    print "%s - %s" % name,score
>>TypeError: not enough arguments for format string
>> 
>>
>>Now I understand what it's saying, but I don't understand why.
>>
>>If I change the code to read:
>>
>>print "%s - %n" % name, score (thinking of course that ah-ha, score is 
>>numeric) then I get the same error.
>>
>>The only way for the program to run is to simply have
>>
>>print name,score (or print score,name)
>> 
>>
>>    
>>
>This is because 'print' is accepting 'score' as a seperate argument, not 
>the formatting, as you want it to.
>Try 'print "%s - %s" % (name, score)'
>  
>
>  
>
>>The final part that's simply not working correctly is that the entire 
>>program isn't sorting the data.
>>
>>If I run the program and get a score of, say, 6789, then when I add my 
>>name, nothing is entered.  I have changed the clause that deletes (pops) 
>>the last array if the array count is 6 and seen what figures are being 
>>entered into the array.
>>
>>Sure enough they are going in the array, and they are being sorted, but 
>>they are only being sorted AFTER the 00000 of the initial array creation.
>>
>>I'm pretty sure it's to do with comparing a string against an integer 
>>but can't for the life of me see where to force the comparrison to check 
>>against two integers.
>>
>> 
>>
>>    
>>
>Humm. This is a harder problem. I will copy this text into JEdit to 
>highlight the text and see if i cannot find the problem.
>
>  
>
Correction: I will fix my apearently semi-broaken Python installation 
wich gives me undefined reference errors from math.h and then see if i 
cannot fix the problem. -.-

>>Apologies for going over old ground and if I'm not understanding, I'm 
>>getting there honest ;)
>>
>> 
>>
>>    
>>
>
>HTH,
>Peter
>
>  
>
Peter



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