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#1
May 2nd, 2013, 10:25 PM
 NotTheBest
Registered User

Join Date: May 2013
Posts: 7
Time spent in forums: 3 h 27 m 7 sec
Reputation Power: 0
What's wrong with this array?

Code:
```num = [0] * size
guess = [0] * size
k=0
i=0
while i < size:
var = random.randint(1,9)
k=i-1
while(k>=0):
if var == num[k]:
k=-2
k-=1
if k>-2:
num[i] = var
i+=1         ```

Problem: The array is loading a duplicated number when it shouldn't be.

Thank you.

#2
May 2nd, 2013, 11:02 PM
 b49P23TIvg
Contributing User

Join Date: Aug 2011
Posts: 4,218
Time spent in forums: 1 Month 3 Weeks 2 Days 18 h 51 m 46 sec
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Run your code with pdb.

Single step with s.

Print values with p, as in
p i,k,var,num
Code:
```import pdb
pdb.set_trace()
size = 4
num = [0] * size
for i in range(len(num)):
var = 1  # assume random.randint returns 1 size times.  It can.
k = i-1
while k>=0:
if var == num[k]:
k=-2
k-=1
if k>-2:
num[i] = var```
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[code]Code tags[/code] are essential for python code!

#3
May 2nd, 2013, 11:08 PM
 Mekire
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Join Date: Oct 2012
Posts: 172
Time spent in forums: 3 Days 8 h 29 m 15 sec
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It would probably be better if you explained what you are trying to accomplish. What you are doing there with the all the while loops and index counters is pretty goofy.

Do you just want a random ordered list of non-repeating numbers of a certain size?
python Code:
 Original - python Code
```import randomnums = list(range(10))random.shuffle(nums)print(nums)
```

-Mek

#4
May 2nd, 2013, 11:23 PM
 NotTheBest
Registered User

Join Date: May 2013
Posts: 7
Time spent in forums: 3 h 27 m 7 sec
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Quote:
Originally Posted by Mekire
It would probably be better if you explained what you are trying to accomplish. What you are doing there with the all the while loops and index counters is pretty goofy.

Do you just want a random ordered list of non-repeating numbers of a certain size?
python Code:
 Original - python Code
```import randomnums = list(range(10))random.shuffle(nums)print(nums)
```

-Mek

I'm making code for the Bulls and Cows game if you're familiar with that. I can't use random.shuffle because I have to compare my random numbers to the user input.

This is for school, and we're going over array's and indexing so that's why I'm coding it the way I am.

#5
May 2nd, 2013, 11:56 PM
 Mekire
Contributing User

Join Date: Oct 2012
Posts: 172
Time spent in forums: 3 Days 8 h 29 m 15 sec
Reputation Power: 2
I don't really see what having to compare to user input has to do with it. I also actually think it would be easier to work with strings than lists of integers in this case, but it makes little difference.

Generate a string of unique numbers of length size:
python Code:
 Original - python Code
```number = ""size = 4while len(number) != size:    num = str(random.randint(1,9))    if num not in number:        number += num
```

After getting your user input check results:
python Code:
 Original - python Code
```cows,bulls = 0,0for i,attempt in enumerate(guess):    for j,solution in enumerate(number):        if attempt == solution:            if i == j:                bulls += 1            else:                cows += 1
```

-Mek

#6
May 2nd, 2013, 11:58 PM
 Scorpions4ever
Banned ;)

Join Date: Nov 2001
Location: Woodland Hills, Los Angeles County, California, USA
Posts: 9,539
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http://forums.devshed.com/python-pr...ers-944510.html

I suggested using random.shuffle() in that thread
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