def list_portal_data_sources(self):
headers = {<EOL>'<STR_LIT>': self.user_agent(),<EOL>}<EOL>headers.update(self.headers())<EOL>r = requests.get(   self.portals_url()+'<STR_LIT>'+self.portal_id()+'<STR_LIT>',<EOL>headers=headers,<EOL>auth=self.auth()<EOL>)<EOL>if HTTP_STATUS.OK == r.status_code:<EOL><INDENT>return r.json()<EOL><DEDENT>else:<EOL><INDENT>print("<STR_LIT>".format(<EOL>r.status_code, r.reason))<EOL>return {}<EOL><DEDENT>
List data sources of the portal.

http://docs.exosite.com/portals/#list-portal-data-source