person.py 文件源码

def _choose_vacant_home_or_vacant_lot(self):
        """Choose a vacant home to move into or a vacant lot to build on.

        Currently, a person scores all the vacant homes/lots in town and then selects
        one of the top three. TODO: Probabilistically select from all homes/lots using the
        scores to derive likelihoods of selecting each.
        """
        home_and_lot_scores = self._rate_all_vacant_homes_and_vacant_lots()
        if len(home_and_lot_scores) >= 3:
            # Pick from top three
            top_three_choices = heapq.nlargest(3, home_and_lot_scores, key=home_and_lot_scores.get)
            if random.random() < 0.6:
                choice = top_three_choices[0]
            elif random.random() < 0.9:
                choice = top_three_choices[1]
            else:
                choice = top_three_choices[2]
        elif home_and_lot_scores:
            choice = list(home_and_lot_scores)[0]
        else:
            choice = None
        return choice