Ensures that flags are not None during program execution.
tf.compat.v1.flags.mark_flags_as_required(
    flag_names, flag_values=_flagvalues.FLAGS
)
If your module might be imported by others, and you only wish to make the flag required when the module is directly executed, call this method like this::
if __name__ == '__main__':
  flags.mark_flags_as_required(['flag1', 'flag2', 'flag3'])
  app.run()
| Args | |
|---|---|
| flag_names | Sequence[str | FlagHolder], names or holders of the flags. | 
| flag_values | flags.FlagValues, optional FlagValues instance where the flags are defined. | 
| Raises | |
|---|---|
| AttributeError | If any of flag name has not already been defined as a flag. |