https://www.sitepoint.com/community/t/can-you-crack-it

codecracker.py

import sys
from itertools import product


class Hint:
    def __init__(
        self,
        digits,
        wrongly_placed=0,
        well_placed=0
    ):
        self.digits = digits
        self.wrongly_placed = wrongly_placed
        self.well_placed = well_placed

    def test(self, digits):
        wrongly_placed = 0
        well_placed = 0

        for index, digit in enumerate(digits):
            if digit == self.digits[index]:
                well_placed += 1
            elif digit in self.digits:
                wrongly_placed += 1

        return (
            wrongly_placed == self.wrongly_placed
            and well_placed == self.well_placed
        )


hints = (
    Hint((6, 8, 2), well_placed=1),
    Hint((6, 1, 4), wrongly_placed=1),
    Hint((2, 0, 6), wrongly_placed=2),
    Hint((7, 3, 8)),
    Hint((7, 8, 0), wrongly_placed=1),
)

for digits in product(range(0, 10), repeat=3):
    if all(hint.test(digits) for hint in hints):
        print(digits)
        sys.exit()