python打印技巧

　　

def jar(b):
    if not isinstance(b,int) or not b > 0:
        print('inaccurate')
        return None
    vv=len(str(b))+1
    for i in range(b):
        for j in range(b-1,-1,-1):
            if j <= i:
                print('{:<{}}'.format(j+1,vv),end='')
            else:
                print(' '*vv,end='')
        print()
     
    for i in range(b-1,-1,-1):
        for j in range(b-1,-1,-1):
            if j <= i:
                print('{:<{}}'.format(j+1,vv),end='')
            else:
                print(' '*vv,end='')
        print()

 

 

 

def hum(b):
    if not isinstance(b,(int,)) or not b > 0:
        print('inaccurate')
    
    tail=' '.join([str(b-v) for v in range(b)])
    width=len(tail)
    for p in range(b-1):
        print('{:>{}}'.format(' '.join([str(m+1) for m in range(p,-1,-1)]),width))
    print(tail)
    
    head=' '.join([str(b-v) for v in range(b)])
    print(head)
    for p in range(len(head)):
        if head[p]==' ':
            print(' '*p,head[p+1:])
        
hum(12)