Pascal's triangle

pascal_triangle.py

class PascalTriangle:
    def __init__(self, n):
        t = [[1.0]]
        for i in range(2, n + 1):
            row = t[i - 2]
            temp = [1.0]
            for j in range(i - 2):
                # temp.append(t[i - 2][j] + t[i - 2][j + 1])
                # temp.append(sum(t[i - 2][j:j + 2]))
                temp.append(sum(row[j:j + 2]))
            temp.append(1.0)

            t.append(temp)
        self.triangle = t
    
    def comb(self, n, m):
        return self.triangle[n][m]