hi, its me again jay, thanks alot everyone for your input on the last program i 
created that solved for the mode,mean, and average of a set of numbers it 
actually worked great..if anyone can give me any ideas on this program i am 
doing now it would be appreciated.I keep would like to understand why on the 
last portion it returns an error.thank you.import shelveimport stringUNKNOWN = 
0HOME = 1WORK = 2FAX = 3CELL = 4class phoneentry:    def __init__(self, name = 
'Unknown', number = 'Unknown',type = UNKNOWN):        self.name = name        
self.number = number        self.type = type#  create string representationdef 
__repr__(self):    return('%s:%d' % ( self.name, self.type ))#  fuzzy compare 
or two itemsdef __cmp__(self, that):    this = string.lower(str(self))    that 
= string.lower(that)    if string.find(this, that) >= 0:        return(0)       
 return(cmp(this, that))def showtype(self):    if self.type == UNKNOWN: 
return('Unknown')    if self.type == HOME: return('Home')    if self.type == 
WORK: return('Work')    if self.type == FAX: return('Fax')    if self.type == 
CELL: return('Cellular')class phonedb:    def __init__(self, dbname = 
'phonedata'):                self.dbname = dbname;        self.shelve = 
shelve.open(self.dbname);def __del__(self):    self.shelve.close()    
self.shelve = Nonedef add(self, name, number, type = HOME):    e = 
phoneentry(name, number, type)    self.shelve[str(e)] = edef lookup(self, 
string):    list = []    for key in self.shelve.keys():        e = 
self.shelve[key]    if cmp(e, string) == 0:        list.append(e)    
return(list)
if __name__ == '__main__':    foo = phonedb()    foo._add_('Sean 
Reifschneider', '970-555-1111', HOME)    foo.add('Sean Reifschneider', 
'970-555-2222', CELL)    foo.add('Evelyn Mitchell', '970-555-1111', HOME)print 
'First lookup:'for entry in foo.lookup('reifsch'):        print '%-40s %s (%s)' 
% ( entry.name, entry.number, entry.showtype())print 'Second lookup:'for entry 
in foo.lookup('e'):    print '%-40s %s (%s)' % ( entry.name, entry.number, 
entry.showtype() )
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