Python implementation of nested lists and dictionaries and de-duplication by an element example of functionality

#! /usr/bin/env python
#coding=utf-8
class HostScheduler(object):
  def __init__(self, resource_list):
    self.resource_list = resource_list
  def MergeHost(self):
    allResource=[]
    (self.resource_list[0])
    for dict in self.resource_list:
      #print len(l4)
      k=0
      for item in allResource:
        #print 'item'
        if dict['host'] != item['host']:
          k=k+1
          #continue
        else:
          break
        if k == len(allResource):
          (dict)
    taskhost=[]
    for item in allResource:
      (item['host'])
    return taskhost
# The function implements a nested list, de-duplicating by an element.
def deleteRepeat():
  #1, Nested lists in lists. Realize de-duplication by element 'b'
  l1=[['b',1],['b',2],['c',3],['a',1],['b',1],['b',1],]
  l2=[]
  (l1[0])
  for data in l1:
    #print len(l2)
    k=0
    for item in l2:
      #print 'item'
      if data[0] != item[0]:
        k=k+1
      else:
        break
      if k == len(l2):
        (data)
  print "l2: ",l2
  #2. Nested dictionaries in lists. De-duplication by key-valuehost implementation
  l3=[{'host':'compute21', 'cpu':2},{'host':'compute21', 'cpu':2},{'host':'compute22', 'cpu':2},
    {'host':'compute23', 'cpu':2},{'host':'compute22', 'cpu':2},{'host':'compute23', 'cpu':2},
    {'host':'compute24', 'cpu':2}]
  l4=[]
  (l3[0])
  for dict in l3:
    #print len(l4)
    k=0
    for item in l4:
      #print 'item'
      if dict['host'] != item['host']:
        k=k+1
        #continue
      else:
        break
      if k == len(l4):
        (dict)
  print "l4: ",l4
if __name__ == '__main__':
  #deleteRepeat()
  resource_list=[{'host':'compute21', 'cpu':2},{'host':'compute21', 'cpu':2},{'host':'compute22', 'cpu':2},
          {'host':'compute23', 'cpu':2},{'host':'compute22', 'cpu':2},{'host':'compute23', 'cpu':2},
          {'host':'compute24', 'cpu':2}]
  hostSchedule=HostScheduler(resource_list)
  taskhost=()
  print 'My test results: '
  print 'taskhost: '
  print taskhost