new_contents: ########
  # Copyright (c) 2015 GigaSpaces Technologies Ltd. All rights reserved
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #        http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  #    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #    * See the License for the specific language governing permissions and
  #    * limitations under the License.
  
  # Built-in Imports
  import requests
  import json
  import constants
  import utils
  import sys
  from cloudify.exceptions import NonRecoverableError
  from azure import WindowsAzureConflictError
  from azure import WindowsAzureMissingResourceError
  from cloudify import ctx
  from cloudify.decorators import operation
  
      
  @operation    
  def vnet_creation_validation(**_):
      ctx.node.properties['vm_name']+'_vnet'
      if vnet_name in [vnet_name for vnet in utils.list_all_vnets()]:
          ctx.logger.info("Virtual Network: " + vnet_name + " successfully created.")
      else:
          ctx.logger.info("Virtual Network " + vnet_name + " creation validation failed.")
          sys.exit(1)
   
  
  @operation
  #vnet:
  def create_vnet(**_):
      for property_key in constants.VNET_REQUIRED_PROPERTIES:
          utils.validate_node_property(property_key, ctx.node.properties)
      resource_group_name = ctx.node.properties['vm_name']+'_resource_group'
      vnet_name = ctx.node.properties['vm_name']+'_vnet'
      location = ctx.node.properties['location']
      subscription_id = ctx.node.properties['subscription_id']
      vnet_url = constants.azure_url+'/subscriptions/'+subscription_id+'/resourceGroups/'+resource_group_name+'/providers/microsoft.network/virtualNetworks/'+vnet_name+'?api-version='+constants.api_version
      ctx.logger.info("Checking availability of virtual network: " + vnet_name)
  
      if vnet_name not in [vnet_name for vnet in utils.list_all_vnets()]:
          try:
              ctx.logger.info("Creating new virtual network: " + vnet_name)
      
              vnet_params=json.dumps({"name":vnet_name, "location": location,"properties": {"addressSpace": {"addressPrefixes": constants.vnet_address_prefixes},"subnets": [{"name": constants.subnet_name, "properties": {"addressPrefix": constants.address_prefix}}]}})
              response_vnet = requests.put(url=vnet_url, data=vnet_params, headers=constants.headers)
              print response_vnet.text
          except WindowsAzureConflictError:
              ctx.logger.info("Virtual Network " + vnet_name + "could not be created.")
              sys.exit(1)
      else:
          ctx.logger.info("Virtual Network" + vnet_name + "has already been provisioned by another user.")
   
  
  @operation
  def delete_vnet(**_):
      vnet_name = ctx.node.properties['vm_name']+'_vnet'
      resource_group_name = ctx.node.properties['vm_name']+'_resource_group'
      subscription_id = ctx.node.properties['subscription_id']
      ctx.logger.info("Checking availability of virtual network: " + vnet_name)
      if vnet_name  in [vnet_name for vnet in utils.list_all_virtual_networks()]:
          try:
              ctx.logger.info("Deleting the virtual network: " + vnet_name)
              vnet_url = 'https://management.azure.com/subscriptions/'+subscription_id+'/resourceGroups/'+resource_group_name+'/providers/microsoft.network/virtualNetworks/'+vnet_name+'?api-version='+constants.api_version
              response_vnet = requests.delete(url=vnet_url,headers=constants.headers)
              print response_vnet.text
  
          except WindowsAzureMissingResourceError:
              ctx.logger.info("Virtual Network " + vnet_name + " could not be deleted.")
          sys.exit(1)
      else:
          ctx.logger.info("Virtual Network " + vnet_name + " does not exist.")
  
  
  def _list_all_vnets(**_):
      resource_group_name = ctx.node.properties['vm_name']+'_resource_group'
      subscription_id = ctx.node.properties['subscription_id']
      list_vnets_url=constants.azure_url+'/subscriptions/'+subscription_id+'/resourceGroups/'+resource_group_name+'/providers/microsoft.network/virtualnetworks?api-version='+constants.api_version
      list_vnet = requests.get(url=list_vnets_url, headers = constants.headers)
      print list_vnet.text
  
      #vnet_list= #extract vnet_name
      #return vnet_list
  
subject: Create vnet.py