1.

class diter:
   def __init__(self,d):
      self.d = d
      self.kys = d.keys()
      self.kynum =  0
   def __iter__(self):
      return self
   def next(self):
      if self.kynum == len(self.d): raise StopIteration
      self.kynum += 1
      return self.d[self.kys[self.kynum-1]]

dt = diter({'a':5, 'b':12, 'c':13})
for delt in dt: print delt

2.

from Queue import Queue
import thread

class glbls:
   Q = Queue()
   numThreads = 2
   top = None
   Lock = thread.allocate_lock()
   sum = 0

def dowork(tnum):
   sum = 0
   while True:
      try:
         i = glbls.Q.get(block=False)
      except:
         break
      sum += i
   glbls.Lock.acquire()
   glbls.numThreads -= 1
   glbls.sum += sum
   glbls.Lock.release()

glbls.top = int(raw_input('enter top: '))
for i in range(glbls.top+1): glbls.Q.put(i)
thread.start_new_thread(dowork,(1,))
thread.start_new_thread(dowork,(2,))

while glbls.numThreads > 0: pass
print glbls.sum