def __init__(self, outpoint=None, scriptSig=b'', nSequence=0):
    if (outpoint is None):
        self.prevout = COutPoint()
    else:
        self.prevout = outpoint
    self.scriptSig = scriptSig
    self.nSequence = nSequence
def __init__(self, outpoint=None, scriptSig=b, nSequence=0):
    if (outpoint is None):
        self.prevout = COutPoint()
    else:
        self.prevout = outpoint
    self.scriptSig = scriptSig
    self.nSequence = nSequence