<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def prt_js(js, sort_keys=True, indent=4):
 """Print Json in pretty format. There's a standard module pprint, can pretty print python dict and list. But it doesn't support sorted key. That why we need this func. Usage:: { "a": 1, "b": 2 } **中文文档** 以人类可读的方式打印可Json化的Python对象。 """

    print(js2str(js, sort_keys, indent))