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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_content(self, url, params=None, limit=0, place_holder=None, root_field='data', thing_field='children', after_field='after', object_filter=None, **kwargs):
 """A generator method to return reddit content from a URL. Starts at the initial url, and fetches content using the `after` JSON data until `limit` entries have been fetched, or the `place_holder` has been reached. :param url: the url to start fetching content from :param params: dictionary containing extra GET data to put in the url :param limit: the number of content entries to fetch. If limit <= 0, fetch the default for your account (25 for unauthenticated users). If limit is None, then fetch as many entries as possible (reddit returns at most 100 per request, however, PRAW will automatically make additional requests as necessary). :param place_holder: if not None, the method will fetch `limit` content, stopping if it finds content with `id` equal to `place_holder`. The place_holder item is the last item to be yielded from this generator. Note that the use of `place_holder` is not 100% reliable as the place holder item may no longer exist due to being removed or deleted. :param root_field: indicates the field in the json response that holds the data. Most objects use 'data', however some (flairlist) don't have the 'data' object. Use None for the root object. :param thing_field: indicates the field under the root_field which contains the list of things. Most objects use 'children'. :param after_field: indicates the field which holds the after item element :param object_filter: if set to an integer value, fetch content from the corresponding list index in the JSON response. For example the JSON response for submission duplicates is a list of objects, and the object we want to fetch from is at index 1. So we set object_filter=1 to filter out the other useless list elements. :type place_holder: a string corresponding to a reddit base36 id without prefix, e.g. 'asdfasdf' :returns: a list of reddit content, of type Subreddit, Comment, Submission or user flair. """

        _use_oauth = kwargs.get('_use_oauth', self.is_oauth_session())

        objects_found = 0
        params = params or {}
        fetch_all = fetch_once = False
        if limit is None:
            fetch_all = True
            params['limit'] = 1024  # Just use a big number
        elif limit > 0:
            params['limit'] = limit
        else:
            fetch_once = True

        if hasattr(self, '_url_update'):
            url = self._url_update(url)  # pylint: disable=E1101

        # While we still need to fetch more content to reach our limit, do so.
        while fetch_once or fetch_all or objects_found < limit:
            if _use_oauth:  # Set the necessary _use_oauth value
                assert self._use_oauth is False
                self._use_oauth = _use_oauth
            try:
                page_data = self.request_json(url, params=params)
                if object_filter:
                    page_data = page_data[object_filter]
            finally:  # Restore _use_oauth value
                if _use_oauth:
                    self._use_oauth = False
            fetch_once = False
            root = page_data.get(root_field, page_data)
            for thing in root[thing_field]:
                yield thing
                objects_found += 1
                # Terminate when we've reached the limit, or place holder
                if objects_found == limit or (place_holder and
                                              thing.id == place_holder):
                    return
            # Set/update the 'after' parameter for the next iteration
            if root.get(after_field):
                # We use `root.get` to also test if the value evaluates to True
                params['after'] = root[after_field]
            else:
                return