python3:打印杨辉三角

#!/usr/bin/env python3
'''
打印杨辉三角
'''

def triangle():
    yield [1]
    yield [1, 1]
    upline = [1, 1]
    count = 0
    while True:
        count += 1
        line = [1]
        for x in range(count):
            line.append(upline[x] + upline[x + 1])
        line.append(1)
        yield line
        upline = line


if __name__ == '__main__':
    yang = triangle()
    for x in range(10):
        print(next(yang))
    
    yang = triangle()
    row = 6
    width = 2
    for x in range(row):
        l = [ str(e).center(width) for e in next(yang)]
        print(''.join(l).center(row * width))

 

来源：CSDN

作者：qq_41572664

链接：https://blog.csdn.net/qq_41572664/article/details/104573521