def integrand(self, s):
        from sympy import gamma
        return self.argument**s \
            * Mul(*(gamma(b - s) for b in self.bm)) \
            * Mul(*(gamma(1 - a + s) for a in self.an)) \
            / Mul(*(gamma(1 - b + s) for b in self.bother)) \
            / Mul(*(gamma(a - s) for a in self.aother))
Get the defining integrand D(s).
dataset/ETHPy150Open sympy/sympy/sympy/functions/special/hyper.py/meijerg.integrand