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【Python】自动格式化json文件

作者:Xsank / 发布于2015/2/15/ 797


	class JsonFormatter:
	 def __init__(self,intend=4,name=""):
	 self.name=name
	 self.intend=intend
	 self.stack=[]
	 self.obj=None
	 self.source=self.get_source(name)
	 self.prepare()
	
	 @staticmethod
	 def json_str(s):
	 return '"'+s+'"'
	
	 @staticmethod
	 def get_source(name):
	 with open(name,'r') as f:
	 return ''.join(f.read().split())
	
	 def prepare(self):
	 try:
	 self.obj=eval(self.source)
	 except:
	 raise Exception('Invalid json string!')
	
	 def line_intend(self,level=0):
	 return '\n'+' '*self.intend*level
	
	 def parse_dict(self,obj=None,intend_level=0):
	 self.stack.append(self.line_intend(intend_level)+'{')
	 intend_level+=1
	 for key,value in obj.items():
	 key=self.json_str(str(key))
	 self.stack.append(self.line_intend(intend_level)+key+':')
	 self.parse(value,intend_level)
	 self.stack.append(',')
	 self.stack.append(self.line_intend(intend_level-1)+'}')
	
	 def parse_list(self,obj=None,intend_level=0):
	 self.stack.append(self.line_intend(intend_level)+'[')
	 intend_level+=1
	 for item in obj:
	 self.parse(item,intend_level)
	 self.stack.append(',')
	 self.stack.append(self.line_intend(intend_level-1)+']')
	
	 def parse(self,obj,intend_level=0):
	 if obj is None:
	 self.stack.append('null')
	 elif obj is True:
	 self.stack.append('true')
	 elif obj is False:
	 self.stack.append('false')
	 elif isinstance(obj,(int,long,float)):
	 self.stack.append(str(obj))
	 elif isinstance(obj,str):
	 self.stack.append(self.json_str(obj))
	 elif isinstance(obj,(list,tuple)):
	 self.parse_list(obj,intend_level)
	 elif isinstance(obj,dict):
	 self.parse_dict(obj,intend_level)
	 else:
	 raise Exception('Invalid json type %s!' % obj)
	
	 def render(self):
	 self.parse(self.obj,0)
	 res_file='good'+self.name
	 res=''.join(self.stack)
	 with open(res_file,'w') as f:
	 f.write(res)
	 print res
	
	if __name__=="__main__":
	 jf=JsonFormatter(name="json.txt")
	 jf.render()

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　格式化　　 json　

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.自动格式化json文件