Stale data and caching problem when dealing with cloud API responses

Because the Rackspace cloud API is using caching extensively you have to write a code that is able to handle a stale HTTP data and be able to resent the request if needed.

Example 

A simple example that sometimes works and another time may not work because the API HTTP response contains 404 status code.

from cloudservers import CloudServers
cs=CloudServers(user, key)
cs.authenticate()
sm=cs.servers
server=sm.create(name, image, flavor)
sm.find( name=_server.name )

The cloud 'find' function [1] raises exception NotFound even though we know that the server is there and it shouldn't. 

Traceback (most recent call last):
  File "performance-single-cs.py", line 175, in module
    Main().run()
  File "performance-single-cs.py", line 172, in run
    self.test_performance(user,key)
  File "performance-single-cs.py", line 134, in test_performance
    t.test_perf_single_cs(1)
  File "performance-single-cs.py", line 105, in test_perf_single_cs
    status=self.check_cs_status(server)
  File "performance-single-cs.py", line 45, in check_cs_status
    server=sm.find( name=_server.name )
  File "/usr/lib/pymodules/python2.7/cloudservers/base.py", line 50, in find
    raise NotFound(404, "No %s matching %s." % (self.resource_class.__name__, kwargs))

References

[1] http://packages.python.org/python-cloudservers/ref/servers.html#classes