code: def protect(self, password=None, read_protect=False, protect_from=0):
          
          if hasattr(self, "_protect"):
              args = "password={0!r}, read_protect={1!r}, protect_from={2!r}"
              args = args.format(password, read_protect, protect_from)
              log.debug("protect({0})".format(args))
              status = self._protect(password, read_protect, protect_from)
              if status is True:
                  self._ndef = None
              return status
          else:
              log.error("this tag can not be protected with nfcpy")
              return None
docs: Protect a tag against future write or read access.
  
          :meth:`protect` attempts to make a tag readonly for all
          readers if *password* is :const:`None`, writeable only after
          authentication if a *password* is provided, and readable only
          after authentication if a *password* is provided and the
          *read_protect* flag is set. The *password* must be a byte or
          character sequence that provides sufficient key material for
          the tag specific protect function (this is documented
          separately for the individual tag types). As a special case,
          if *password* is set to an empty string the :meth:`protect`
          method uses a default manufacturer value if such is known.
  
          The *protect_from* argument sets the first memory unit to be
          protected. Memory units are tag type specific, for a Type 1 or
          Type 2 Tag a memory unit is 4 byte, for a Type 3 Tag it is 16
          byte, and for a Type 4 Tag it is the complete NDEF data area.
  
          Note that the effect of protecting a tag without password can
          normally not be reversed.
  
          The return value of :meth:`protect` is either :const:`True` or
          :const:`False` depending on whether the operation was
          successful or not, or :const:`None` if the tag does not
          support custom protection (or it is not implemented).