Деян обнови решението на 31.03.2013 20:05 (преди над 11 години)
+class Person:
+ def __init__(self, name, birth_year, gender, father=None, mother=None):
+ self.name = name
+ self.birth_year = birth_year
+ self.gender = gender
+ self.father = father
+ self.mother = mother
+ self._children = set()
+
+ if father is not None:
+ father._add_child(self)
+ if mother is not None:
+ mother._add_child(self)
+
+ def _add_child(self, child):
+ self._children.add(child)
+
+ def get_siblings(self):
+ siblings = set()
+ if self.mother is not None:
+ siblings |= self.mother._children
+ if self.father is not None:
+ siblings |= self.father._children
+ if self in siblings:
+ siblings.remove(self)
+ return siblings
+
+ def get_brothers(self):
+ return list(filter(lambda child: child.gender == 'M',
+ self.get_siblings()))
+
+ def get_sisters(self):
+ return list(filter(lambda child: child.gender == 'F',
+ self.get_siblings()))
+
+ def children(self, gender=None):
+ if gender is None:
+ return list(self._children)
+ else:
+ return list(filter(lambda child: child.gender == gender,
+ self._children))
+
+ def is_direct_successor(self, child):
+ return child in self._children