Method shuffle

Lib/random.py:356–363

Shuffle list x in place, and return None.

(self, x)

        return seq[self._randbelow(len(seq))]

    def shuffle(self, x):
        """Shuffle list x in place, and return None."""

        randbelow = self._randbelow
        for i in reversed(range(1, len(x))):
            # pick an element in x[:i+1] with which to exchange x[i]
            j = randbelow(i + 1)
            x[i], x[j] = x[j], x[i]

    def sample(self, population, k, *, counts=None):
        """Chooses k unique random elements from a population sequence.