def colum_family_delete(self,machine_id,keyspace_name,column_family_name):
		"""Create a column family in a given keyspace """
		if (self.keyspace_contains(keyspace_name,column_family_name) == False):
			print "Error : Keyspace:column family could not be found."
			return False
		sys = SystemManager(machine_id)
		sys.drop_column_family(keyspace_name, column_family_name)
		self.keyspace_columnfamily_list('localhost:9160')
		sys.close()
		return True
 def colum_family_delete(self, machine_id, keyspace_name,
                         column_family_name):
     """Create a column family in a given keyspace """
     if (self.keyspace_contains(keyspace_name,
                                column_family_name) == False):
         print "Error : Keyspace:column family could not be found."
         return False
     sys = SystemManager(machine_id)
     sys.drop_column_family(keyspace_name, column_family_name)
     self.keyspace_columnfamily_list('localhost:9160')
     sys.close()
     return True
	def colum_family_delete(self,machine_id,keyspace_name,column_family_name):
		"""Create a column family in a given keyspace """
		keyspace.error = "Unknown error occur please check your inputs"
		if (self.keyspace_contains(keyspace.local_system,keyspace_name,column_family_name) == False):
			keyspace.error = "Desired Keyspace,Column Family pair could not be found."
			return False
		try:
			sys = SystemManager(machine_id)
		except Exception as e:
			print e
			return False
		try:
			sys.drop_column_family(keyspace_name, column_family_name)
		except Exception as e:
			print e		
			return False
		sys.close()
		return True
	def colum_family_delete(self,machine_id,keyspace_name,column_family_name):
		"""Create a column family in a given keyspace """
		print "->>>in column family create function"
		sys = SystemManager(machine_id)
		sys.drop_column_family(keyspace_name, column_family_name)
		return 1