def _UpdateOptions(self, parser):
    parser.add_option('--no_precompilation', action='store_false',
                      dest='precompilation', default=True,
                      help='Disable automatic Python precompilation.')
    parser.add_option('--backends', action='store_true',
                      dest='backends', default=False,
                      help='Update backends when performing appcfg update.')
Adds update-specific options to 'parser'.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/appcfg.py/AppCfgApp._UpdateOptions