binomial theorem in python

    f = 1
    for i in range(2, n+1): 
        f *= i  
          
    return f 
  
# Function to print the series 
def series(A, X, n): 
      
    # calculating the value of n! 
    nFact = factorial(n) 
  
    # loop to display the series 
    for i in range(0, n + 1):  
          
        # For calculating the  
        # value of nCr 
        niFact = factorial(n - i) 
        iFact = factorial(i) 
  
        # calculating the value of  
        # A to the power k and X to 
        # the power k 
        aPow = pow(A, n - i) 
        xPow = pow(X, i) 
  
        # display the series 
        print (int((nFact * aPow * xPow) /
                   (niFact * iFact)), end = " ")