root@ip-172-31-83-14:/home# python /var/www/API/API/__init__.py
Traceback (most recent call last):
  File "/var/www/API/API/__init__.py", line 126, in <module>
    app.run(host='172.31.53.239')
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 841, in run
    run_simple(host, port, self, **options)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 814, in run_simple
    inner()
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 774, in inner
    fd=fd)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 666, in make_server
    passthrough_errors, ssl_context, fd=fd)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 577, in __init__
    self.address_family), handler)
  File "/usr/lib/python2.7/SocketServer.py", line 417, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/BaseHTTPServer.py", line 108, in server_bind
    SocketServer.TCPServer.server_bind(self)
  File "/usr/lib/python2.7/SocketServer.py", line 431, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 99] Cannot assign requested address
root@ip-172-31-83-14:/home#