title: Python error importing dateutil
body: <p>I try to execute marathon-lb.py and it throws the next error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "./marathon_lb.py", line 46, in &lt;module&gt;
      import dateutil.parser
  ImportError: No module named 'dateutil'
  </code></pre>
  
  <p>I just install python with apt and with pip.
  I have run:</p>
  
  <pre><code>sudo apt-get install python-pip
  pip install python-dateutil
  </code></pre>
  
  <p>I compile the script with: python -m py_compile script.py</p>
  
  <p>python application:</p>
  
  <pre><code>from operator import attrgetter
  from shutil import move
  from tempfile import mkstemp
  from wsgiref.simple_server import make_server
  from six.moves.urllib import parse
  from itertools import cycle
  from common import *
  from config import *
  from lrucache import *
  from utils import *
  
  import argparse
  import json
  import logging
  import os
  import os.path
  import stat
  import re
  import requests
  import shlex
  import subprocess
  import sys
  import time
  import dateutil.parser
  </code></pre>