I am writing a program to determine the conic sequence of a user's inputted data set, for example - [0000,1,2222,9999],
I was struggling with sequencing the conic sequence using only a 4 digit classification, instead of the typical 8/16 binary approaches.
I have tried this:
for t in permutations(numbers, 4):
print(''.join(t))
But it does not assign a unique value to the inputted data, and instead overrides previous ones.
How can I go about doing this?
Since your list only contains the numbers 0 through 9 and you're looping over that list, printing the content as you go, it will only print 0 through 9.
Since all possible combinations (or rather permutations, because that's what you're asking about) of the normal decimal digits are just the numbers 0 through 9999, you could do this instead:
for i in range(10000):
print(i)
See https://docs.python.org/3/library/functions.html#func-range for more on range().
But that doesn't print numbers like '0' as '0000'. To do that (in Python 3, which is probably what you should be using):
for i in range(10000):
print(f"{i:04d}")
See https://docs.python.org/3/reference/lexical_analysis.html#f-strings for more on f-strings.
Of course, if you need permutations of something other than digits, you can't use this method. You'd do something like this instead:
from itertools import permutations
xs = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']
for t in permutations(xs, 4):
print(''.join(t))
See https://docs.python.org/3/library/itertools.html#itertools.permutations for more on permutations() and the difference with combinations().
You can also do something like this, if you want to change some information by the future :
import math
NUMBERS = [0,1,2,3,4,5,6,7,8,9]
DIGITS = 4
MAX_ITERS = int(math.pow(len(NUMBERS), DIGITS))
for i in range(MAX_ITERS):
print(f"{i:04d}")
len(NUMBERS) ** DIGITS works just fine, no need for math
for i in range(10000), or use itertools combinationsiwill become all the values between[0 - 9999].zfill(4)(for performance probably do it only if the number is below a 1000)