Printing pascal traingle

pascal'sTriangle.py

 def generate(A):
        triangle = []
        for rownum in range(A) :
            nextValue = 1
            row = [nextValue]
            for i in range(rownum) :
                nextValue = nextValue * (rownum - i) * 1 / (i + 1)
                row.append(nextValue)
            triangle.append(row)
        return triangle
        
#This function will return pascal's triangle having A number of rows