#namedtuple
Point = namedtuple('Point', ('x','y'))
print(Point)
p = Point(1,2)
print(p,isinstance(p, tuple))
#deque
q = deque(['1','2','3'])
q.append('4')
q.appendleft('0')
print(q)
#defaultdict
d = defaultdict(lambda: 'dd-no')
d['k1'] = 'v1'
print(d)
print(d['k2'])
#orderedict
d = dict([(1,'a'),(2,'b'),(3,'c')])
print(d)
od = OrderedDict([(1,'a'),(2,'b'),(3,'c')])
