def func(m):
 n,a,b = 0,1,1
 while n < m:
 yield a
 a,b = b,a+b
 n += 1
for one in func(10):
 print one

def myextend(alist):
 tmp = []
 for one in alist:
  if isinstance(one,list):
   tmp.extend(myextend(one))
  else:
   tmp.append(one)
 return tmp
t = [1,2,5,[3,[],5,2,[57]],90]
print t
print myextend(t)

def test(x,l=[]):
 for o in range(x):
  l.append(o)
 print l
test(3)
test(1,[3,2,1])
test(3)

[0,1,2]
[3,2,1,0]
[0,1,2,0,1,2]

def fun(alist):
 result = []
 temp = set()
 for o in alist:
  if o not in temp:
   result.append(o)
   temp.add(o)
 return result

z = [lambda x:x*i for i in range(3)]
x = [o(2) for o in z]
print x

def func():
 def m(x):
  def n(y):
   return x * y
  return n
 return [f(one) for one in range(3)]
z = func()
x = [o(2) for o in z]
print x

class Mycls(object):
 a = 0
 def __getattr__(self,name):
  print name
z = Mycls()
print z.a,z.b