code: def install_patches(patchers='all'):
      
      if patchers is None or patchers == 'all':
          install_all_patches()
          return
      if not _valid_args(patchers):
          raise ValueError('patchers argument must be None, "all", or a list')
  
      for patch_func_name in patchers:
          logging.info('Loading client hook %s', patch_func_name)
          patch_func = _load_symbol(patch_func_name)
          logging.info('Applying client hook %s', patch_func_name)
          patch_func()
docs: Usually called from middleware to install client hooks
      specified in the client_hooks section of the configuration.
  
      :param patchers: a list of patchers to run. Acceptable values include:
        * None - installs all client patches
        * 'all' - installs all client patches
        * empty list - does not install any patches
        * list of function names - executes the functions