human
Complete this python program:
def cache_page(*args, **kwargs):
assistant
#Here is the Python code you requested.

    """Decorator for views that tries getting the page from the cache and
    populates the cache if the page isn\t in the cache yet.
    The cache is keyed by the URL and some data from the headers.
    Additionally there is the key prefix that is used to distinguish different
    cache areas in a multi-site setup. You could use the
    sites.get_current().domain, for example, as that is unique across a Django
    project.
    Additionally, all headers from the response\s Vary header will be taken
    into account on caching -- just like the middleware does.
    """
    cache_alias = kwargs.pop('cache', None)
    key_prefix = kwargs.pop('key_prefix', None)
    assert (not kwargs), 'The    only    keyword    arguments    are    cache    and    key_prefix'
    def warn():
        import warnings
        warnings.warn('The    cache_page    decorator    must    be    called    like:    cache_page(timeout,    [cache=cache    name],    [key_prefix=key    prefix]).    All    other    ways    are    deprecated.', PendingDeprecationWarning, stacklevel=3)
    if (len(args) > 1):
        assert (len(args) == 2), 'cache_page    accepts    at    most    2    arguments'
        warn()
        if callable(args[0]):
            return decorator_from_middleware_with_args(CacheMiddleware)(cache_timeout=args[1], cache_alias=cache_alias, key_prefix=key_prefix)(args[0])
        elif callable(args[1]):
            return decorator_from_middleware_with_args(CacheMiddleware)(cache_timeout=args[0], cache_alias=cache_alias, key_prefix=key_prefix)(args[1])
        else:
            assert False, 'cache_page    must    be    passed    a    view    function    if    called    with    two    arguments'
    elif (len(args) == 1):
        if callable(args[0]):
            warn()
            return decorator_from_middleware_with_args(CacheMiddleware)(cache_alias=cache_alias, key_prefix=key_prefix)(args[0])
        else:
            return decorator_from_middleware_with_args(CacheMiddleware)(cache_timeout=args[0], cache_alias=cache_alias, key_prefix=key_prefix)
    else:
        warn()
        return decorator_from_middleware_with_args(CacheMiddleware)(cache_alias=cache_alias, key_prefix=key_prefix)