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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 staking_leaderboard(round_num=0, tournament=1):
 """Retrieves the staking competition leaderboard for the given round."""

    click.echo(prettify(napi.get_staking_leaderboard(tournament=tournament,
                                                     round_num=round_num)))