[Tutor] Newbie question: random.sample illusion?

[Moedeloos Overste]

Hi everybody,

I'm in the process of learning Python and working my way through O'Reilly's 
"Learning Python". As an excercise I wrote (some copy/paste as well) a small 
lottery program just to learn how to work with lists and dictionarys etc.

The user has to enter 6 numbers from a range(1-45). The numbers are stored 
in a list(num_list). Then the program asks the user how many times(vDraws) 
he wants to play the lottery with his numbers. After entering the program 
draws the lottery the desired number of times and compares the winning 
numbers with the users numbers.

Now, by accident I stumbled upon the following; if the user enters the 
numbers 1 to 6 as his lottery numbers he always wins! So somewhere I must 
have made a mistake. Could somebody have a look at the code please and tell 
me where I took a wrong turn?



winnings=0
right2=1
right3=4
right4=15
right5=450
right6=1000000

user_nums=[] # empty List for numbers
print "Kies je nummers tussen 0 en 46"
print
whereat=1
listindex=0
# when 7th number is inputted loop breaks
while whereat <= 6:
    num=raw_input("Voer "+str(whereat)+". Lotto nummer in: ")
    # check that user inputted value is not smaller than 1 or bigger than 45
    # and that it is not already in user_nums
    if num != "" and len(num) != 0:
        if int(num) >= 1 and int(num) <= 45 and num not in user_nums:
             user_nums.append(num)
             whereat+=1
             listindex+=1
            # if above statement if false just pass and ask for the number 
again!
        else:
            pass
print '1 trekking kost U 1 euro inzet'
print
vDraws = input("Hoe vaak wil je in de lotto spelen met deze nummers? :>")

# Create dictionary for statiscal purposes later on :-)
d={1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0, 8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 
14:0, 15:0,
    16:0, 17:0, 18:0, 19:0, 20:0, 21:0, 22:0, 23:0, 24:0, 25:0, 26:0, 27:0, 
28:0,
    29:0, 30:0, 31:0, 32:0, 33:0, 34:0, 35:0, 36:0, 37:0, 38:0, 39:0, 40:0, 
41:0, 42:0,
    43:0, 44:0, 45:0}

match=0
count=0
inzet=vDraws * 1
while vDraws > 0:
    x=random.sample(range(1,46), 6)# draws lottery from given range
    for i in x:
        y=int(i)
        d[y] = int(d[y])+ 1 #stores values in lottonumbers dictionary
        for p in user_nums:
           count+=1
           y=str(y)
           if p in y:
                match+=1 # increase matching variable by one if its right 
number

        # caculating winnings
        if match ==2:
            winnings+=right2
            match=0
        elif match ==3:
            winnings+=right3
            match=0
        elif match == 4:
            winnings+=right4
            match=0
        elif match == 5:
            winnings+=right5
            match=0
        elif match == 6:
            winnings+=right6
            match=0
        vDraws = vDraws - 1

# sorting dictionary by its values
items=d.items()
backitems=[ [v[1],v[0]] for v in items]
backitems.sort()
sortedlist=[ backitems[i][1] for i in range(0,len(backitems))]

print
print
print
saldo=winnings-inzet
print
print
print '-' * 80
if saldo > 0:
    print 'U heeft', saldo, 'euro winst gemaakt!'
else:
    print 'U heeft', saldo, ' euro verlies geleden!'


print 'U heeft in totaal gewonnen', winnings, 'euro.'
print 'Uw inzet was', inzet, 'euro'
print 'De 6 meest gevallen getallen waren:',
for x in sortedlist[0:6]: print x, #prints the 6 most drawn numbers

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