def _set_sci_tx(self, v, load=False):
    """
    Setter method for sci_tx, mapped from YANG variable /macsec/interfaces/interface/scsa_tx/scsa_tx/state/sci_tx (oc-yang:hex-string)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_sci_tx is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_sci_tx() directly.

    YANG Description: Secure Channel Identifier.