BubbleMonster BubbleMonster - 4 months ago 34
Python Question

Python - all lottery combinations - no duplicates, in order

I've wrote a script to print out lottery combinations. What i'm aiming for is this: There are 6 numbers in the lottery between 1-49 meaning there are 13,983,816 combinations. I want to print out all combinations IN ORDER whilst making sure there are NO duplicates.

Here is my code so far:

import random
numbers = []
for i in range(2):
for j in range(6):
numbers.append(random.randint(1,49))
for k in range(j):
while numbers[j]==numbers[k]:
numbers[j]=random.randint(1,49)
print sorted(numbers)
numbers = []
f = open('combinations.txt', 'w')
f.write(str(sorted(numbers)))


The problems are:

The output in the terminal is:

[18, 20, 27, 32, 44, 48]
[5, 7, 10, 13, 33, 45]


I want to start with
[1,2,3,4,5,6]
and end up at
[44,45,46,47,48,49]
. So I need to order the results.

Also, I've tried converting the list to a string so I can put the results in a big text file, but I'm just printing
[]
to the text file at the moment.

Answer

You were clearing your list then writing to the file.

from itertools import combinations
f = open('combinations.txt', 'w')
for comb in combinations(range(1,50), 6):
    f.write(str(comb))
    f.write('\n')
f.close()

But make sure you have at least 350 Megabytes of disk space free! and some time to spare.

(348168480 bytes I checked with:

>>> s = 0
>>> for comb in combinations(range(1,50), 6):
...    s += len(repr(comb))+2
... 
>>> s
348168480

).

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