(self)
return 0
Can we create a quasi-particle?  (create hole or create particle)
        If so, would that be above or below the fermi surface?

        >>> from sympy import Symbol
        >>> from sympy.physics.secondquant import F
        >>> a = Symbol('a', above_fermi=True)
        >>> i = Symbol('i', below_fermi=True)
        >>> p = Symbol('p')

        >>> F(a).is_q_creator
        0
        >>> F(i).is_q_creator
        -1
        >>> F(p).is_q_creator
        -1
Can we create a quasi-particle?  (create hole or create particle)
        If so, would that be above or below the fermi surface?
Can we create a quasi - particle? ( create hole or create particle ) If so would that be above or below the fermi surface?
def is_q_creator(self):
        """
        Can we create a quasi-particle?  (create hole or create particle)
        If so, would that be above or below the fermi surface?

        >>> from sympy import Symbol
        >>> from sympy.physics.secondquant import F
        >>> a = Symbol('a', above_fermi=True)
        >>> i = Symbol('i', below_fermi=True)
        >>> p = Symbol('p')

        >>> F(a).is_q_creator
        0
        >>> F(i).is_q_creator
        -1
        >>> F(p).is_q_creator
        -1

        """
        if self.is_below_fermi:
            return -1
        return 0
def is_q_creator ( self ) : if self . is_below_fermi : return - 1 return 0