'Returns a copy of the operand with the sign set to 0.
>>> ExtendedContext.copy_abs(Decimal(\'2.1\'))
Decimal(\'2.1\')
>>> ExtendedContext.copy_abs(Decimal(\'-100\'))
Decimal(\'100\')
>>> ExtendedContext.copy_abs(-1)
Decimal(\'1\')'

def copy_abs(self, a):

    a = _convert_other(a, raiseit=True)
    return a.copy_abs()
