test_dsl.py 文件源码

def binomial_factorial(self,n,k):
        """Calculate binomial coefficient using math.factorial, for testing against binomial
        coefficients generated by other means."""
        if n >= k: 
            return int( round( math.factorial(n) / ( math.factorial(k) * math.factorial(n - k) ) ) )
        else:
            return 0