Python，以元组格式打印，不起作用

Question

以下是代码：

#! /usr/bin/python
def goodDifference(total, partial, your_points, his_points):
    while (total - partial >= your_points - his_points):
        partial = partial+1
        your_points = your_points+1
        return (partial, your_points, his_points)
def main():
     total = int(raw_input('Enter the totaln'))
     partial = int(raw_input('Enter the partialn'))
     your_points = int(raw_input('Enter your pointsn'))
     his_points = int(raw_input('Enter his pointsn'))
     #print 'Partial {}, yours points to insert {}, points of the other player {}'.format(goodDifference(total, partial, your_points, his_points))
     #print '{} {} {}'.format(goodDifference(total, partial, your_points, his_points))
     print goodDifference(total, partial, your_points, his_points)
if __name__ == "__main__":
     main()

两个带注释的格式打印不起作用，执行时报告此错误：IndexError: tuple index out of range。最后一次打印（未发表评论），效果良好。我读过很多Python中格式化字符串的例子，我不明白为什么我的代码不起作用。

我的python版本是2.7.6

Answer 1

str.format()需要单独的参数，并且您将元组作为单个参数传递。因此，它将元组替换为第一个{}，然后就没有更多的项留给下一个了。要将元组作为单独的参数传递，请对其进行解压缩：

print '{} {} {}'.format(*goodDifference(total, partial, your_points, his_points))

Answer 2

为什么不直接打印元组中的值？

t = goodDifference(total, partial, your_points, his_points)
print '{', t[0], '} {', t[1], '} {', t[2], '}'