code: def _find_no_duplicates(self, name, domain=None, path=None):
          
          toReturn = None
          for cookie in iter(self):
              if cookie.name == name:
                  if domain is None or cookie.domain == domain:
                      if path is None or cookie.path == path:
                          if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
                              raise CookieConflictError('There are multiple cookies with name, %r' % (name))
                          toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
  
          if toReturn:
              return toReturn
          raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
docs: Both ``__get_item__`` and ``get`` call this function: it's never
          used elsewhere in Requests.
  
          :param name: a string containing name of cookie
          :param domain: (optional) string containing domain of cookie
          :param path: (optional) string containing path of cookie
          :raises KeyError: if cookie is not found
          :raises CookieConflictError: if there are multiple cookies
              that match name and optionally domain and path
          :return: cookie.value