How to use the rs4.attrdict function in rs4

def headers (self):
		if self.__headerdict:
			return self.__headerdict
		headerdict = attrdict.CaseInsensitiveDict ()
		for line in self.header:
			try:
				k, v = line.split (": ", 1)
			except ValueError:
				k, v = line.split (":", 1)
			if k in headerdict:
				try: headerdict [k].append (v)
				except AttributeError:
					headerdict [k] = [headerdict [k], v]
			else:		
				headerdict [k] = v
		self.__headerdict = headerdict	
		return headerdict

def normheader (headers):
    nheader = attrdict.CaseInsensitiveDict ({})
    if not headers:
        return nheader
    for k, v in type (headers) is dict and headers.items () or headers:
        nheader [k] = v
    return nheader

def fit_headers (self, headers):
		if isinstance (headers, attrdict.CaseInsensitiveDict):
			self.headers = headers
			self.remove_header ("content-length", "connection")
			if not self.headers.get ("accept"):
				self.headers ["Accept"] = "*/*"
		else:	
			self.headers = attrdict.CaseInsensitiveDict ()			
			self.headers ["Accept-Encoding"] = "gzip"
			if headers:			
				for k, v in type (headers) is dict and headers.items () or headers:
					n = k.lower ()
					if n in ("content-length", "connection"):
						# reanalyze
						continue					
					self.headers [k] = v

def __init__ (self, uri, method, params = (), headers = None, auth = None, logger = None, meta = {}, http_version = "2.0"):
		self.uri = uri
		self.method = method
		self.params = params
		self.auth = (auth and type (auth) is not tuple and tuple (auth.split (":", 1)) or auth)
		self.logger = logger
		self.meta = meta
		self.http_version = http_version
		self.address, self.path = self.split (uri)
	
		self.headers = attrdict.CaseInsensitiveDict ({
			"grpc-timeout": "10S",			
			"grpc-accept-encoding": "identity,gzip",
			"user-agent": self.user_agent,
			"message-type": self.params [0].__class__.__name__,
			"te": 'trailers',
		})
		if self.use_compress:
			self.headers ["grpc-encoding"] = "gzip",
			
		self.payload = self.serialize ()
		if not self.payload:
			self.method = "GET"
		else:
			self.headers ["Content-Type"] = "application/grpc+proto"

def fit_headers (self, headers):
		if isinstance (headers, attrdict.CaseInsensitiveDict):
			self.headers = headers
			self.remove_header ("content-length", "connection")
			if not self.headers.get ("accept"):
				self.headers ["Accept"] = "*/*"
		else:	
			self.headers = attrdict.CaseInsensitiveDict ()			
			self.headers ["Accept-Encoding"] = "gzip"
			if headers:			
				for k, v in type (headers) is dict and headers.items () or headers:
					n = k.lower ()
					if n in ("content-length", "connection"):
						# reanalyze
						continue					
					self.headers [k] = v