code: def insert(self,
                 entity_id,
                 property_uri,
                 value):
          
          if not entity_id.startswith("http"):
              entity_uri = urllib.parse.urljoin(self.base_url, entity_id)
          else:
              entity_uri = entity_id
          if entity_uri.endswith("/"):
              entity_uri = entity_uri[:-1]
          if not entity_id.endswith("fcr:metadata"):
              entity_uri = "/".join([entity_uri, "fcr:metadata"])
          if not self.exists(entity_id):
              self.create(entity_id)
          sparql_template = Template("""$prefix
          INSERT DATA {
               <$entity> $prop_uri $value_str ;
          }""")
          sparql = sparql_template.substitute(
              prefix=build_prefixes(self.namespaces),
              entity=entity_uri,
              prop_uri=property_uri,
              value_str=self.__value_format__(value))
          update_request = urllib.request.Request(
              entity_uri,
              data=sparql.encode(),
              method='PATCH',
              headers={'Content-Type': 'application/sparql-update'})
          try:
              response = urllib.request.urlopen(update_request)
          except urllib.error.HTTPError:
              print("Error trying patch {}, sparql=\n{}".format(entity_uri,
                  sparql))
              return False
          if response.code < 400:
              return True
          return False
docs: Method inserts a new entity's property in Fedora4 Repository
  
          Args:
              entity_id(string): Unique ID of Fedora object
              property_uri(string): URI of property
              value: Value of the property, can be literal or URI reference
  
          Returns:
              boolean: True if successful changed in Fedora, False otherwise