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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 charts_slug_get(self, slug, **kwargs):
 """ Chart A Chart is chosen by Pollster editors. One example is \"Obama job approval - Democrats\". It is always based upon a single Question. Users should strongly consider basing their analysis on Questions instead. Charts are derived data; Pollster editors publish them and change them as editorial priorities change. This method makes a synchronous HTTP request by default. To make an asynchronous HTTP request, please define a `callback` function to be invoked when receiving the response. :param callback function: The callback function for asynchronous request. (optional) :param str slug: Unique identifier for a Chart (required) :return: Chart If the method is called asynchronously, returns the request thread. """

        kwargs['_return_http_data_only'] = True
        if kwargs.get('callback'):
            return self.charts_slug_get_with_http_info(slug, **kwargs)
        else:
            (data) = self.charts_slug_get_with_http_info(slug, **kwargs)
            return data