parameters: (self, acl_str, headers=None)
return_statement: return self._set_acl_helper(acl_str, '', headers, query_args,
                                      generation=None, if_generation=None,
                                      if_metageneration=None, canned=True)
docstring: Sets a bucket's default ACL using a predefined (canned) value.
  
          :type acl_str: string
          :param acl_str: A canned ACL string. See
              :data:`~.gs.acl.CannedACLStrings`.
  
          :type headers: dict
          :param headers: Additional headers to set during the request.
docstring_summary: Sets a bucket's default ACL using a predefined (canned) value.
docstring_tokens: Sets a bucket s default ACL using a predefined ( canned ) value .
function: def set_def_canned_acl(self, acl_str, headers=None):
          """Sets a bucket's default ACL using a predefined (canned) value.
  
          :type acl_str: string
          :param acl_str: A canned ACL string. See
              :data:`~.gs.acl.CannedACLStrings`.
  
          :type headers: dict
          :param headers: Additional headers to set during the request.
          """
          if acl_str not in CannedACLStrings:
              raise ValueError("Provided canned ACL string (%s) is not valid."
                               % acl_str)
          query_args = DEF_OBJ_ACL
          return self._set_acl_helper(acl_str, '', headers, query_args,
                                      generation=None, if_generation=None,
                                      if_metageneration=None, canned=True)
function_tokens: def set_def_canned_acl ( self , acl_str , headers = None ) : if acl_str not in CannedACLStrings : raise ValueError ( "Provided canned ACL string (%s) is not valid." % acl_str ) query_args = DEF_OBJ_ACL return self . _set_acl_helper ( acl_str , '' , headers , query_args , generation = None , if_generation = None , if_metageneration = None , canned = True )