How to deal with the proxy

[HappyDean]

Hi there
I am new in Python and Evernote API.
Currently, I followed other people's advice, doing some simple tests first. When I am home (without proxy), the sample code works fine, but however when I am back to office, there is the proxy, so I am not so sure how to upload the file via proxy. I tested a lot , but nothing seemed to work.
Can someone help me with this issue?!

import sys
import hashlib
import time
from evernote.api.client import EvernoteClient
import thrift.protocol.TBinaryProtocol as TBinaryProtocol
import thrift.transport.THttpClient as THttpClient
import evernote.edam.userstore.UserStore as UserStore
import evernote.edam.userstore.constants as UserStoreConstants
import evernote.edam.notestore.NoteStore as NoteStore
import evernote.edam.type.ttypes as Types
import evernote.edam.error.ttypes as Errors
import getpass
import mimetypes

evernoteHost = "sandbox.evernote.com"
userStoreUri = "https://" + evernoteHost + "/edam/user"
noteStoreUriBase = "https://" + evernoteHost + "/edam/note/"


dev_token ="My develop token"
client = EvernoteClient(token=dev_token)
userStore = client.get_user_store()
user = userStore.getUser()
print "Authentication was successful for", user.username

noteStoreUri =  noteStoreUriBase + user.shardId
noteStoreHttpClient = THttpClient.THttpClient(noteStoreUri)
noteStoreProtocol = TBinaryProtocol.TBinaryProtocol(noteStoreHttpClient)
noteStore = NoteStore.Client(noteStoreProtocol)

notebooks = noteStore.listNotebooks(dev_token)
for notebook in notebooks:
  if notebook.defaultNotebook:
    defaultNotebook = notebook

tags = raw_input("Tags (separated by commas): ").split(',')

for arg in sys.argv[1:]:
  print "Uploading", arg, "...",
  sys.stdout.flush()
  filedata = open( arg, 'rb').read()
  md5 = hashlib.md5()
  md5.update(filedata)
  hashHex = md5.hexdigest()

  data = Types.Data()
  data.size = len(filedata)
  data.bodyHash = hashHex
  data.body = filedata

  resource = Types.Resource()
  resource.mime = mimetypes.guess_type( arg)[0]
  resource.data = data

  note = Types.Note()
  note.notebookGuid = defaultNotebook.guid
  note.title = arg
  note.content = '<?xml version="1.0" encoding="UTF-8"?>'
  note.content += '<!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml.dtd">'
  note.content += '<en-note>'
  note.content += '<en-media type="' + resource.mime + '" hash="' + hashHex + '"/>'
  note.content += '</en-note>'
  note.created = int(time.time() * 1000)
  note.updated = note.created
  note.resources = [ resource ]
  note.tagNames = tags

  createdNote = noteStore.createNote(dev_token, note)

  print "DONE"