def check_exists(self):

		'''
		Check if resource exists, update self.exists, returns

		Returns:
			None: sets self.exists
		'''

		response = self.repo.api.http_request('HEAD', self.uri)
		self.status_code = response.status_code
		# resource exists
		if self.status_code == 200:
			self.exists = True
		# resource no longer here
		elif self.status_code == 410:
			self.exists = False
		# resource not found
		elif self.status_code == 404:
			self.exists = False
		return self.exists
Check if resource exists, update self.exists, returns

		Returns:
			None: sets self.exists