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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 print_cyjs_context(self):
 """Return a list of node names and their respective context. Returns ------- cyjs_str_context : str A json string of the context dictionary. e.g. - {'CCLE' : {'bin_expression' : {'cell_line1' : {'gene1':'val1'} }, 'bin_expression' : {'cell_line' : {'gene1':'val1'} } }} """

        context = self._context
        context_str = json.dumps(context, indent=1, sort_keys=True)
        return context_str