code: def js2str(js, sort_keys=True, indent=4):
      
      return json.dumps(js, sort_keys=sort_keys,
                        indent=indent, separators=(",", ": "))
docs: Encode js to nicely formatted human readable string. (utf-8 encoding)
  
      Usage::
  
          >>> from weatherlab.lib.dataIO.js import js2str
          >>> s = js2str({"a": 1, "b": 2})
          >>> print(s)
          {
              "a": 1,
              "b": 2
          }
  
      **中文文档**
  
      将可Json化的Python对象转化成格式化的字符串。