小编Sak*_*n55的帖子

我写的代码:

def ball(f):  
    py_ball = f * 5
    u_ball = py_ball / 10  
    return py_ball, u_ball
print("py ball: {}, u ball: {}".format(ball(100)))

当我使用时str.format,它抛出一个异常:

Traceback (most recent call last):
  File "rear.py", line 5, in 
    print("py ball: {}, u ball: {}".format(ball(100)))
IndexError: tuple index out of range

但如果我使用%格式:

print("py ball: %d, u ball: %d" % ball(100))

它工作正常并产生:

py ball: 500, u ball: 50