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 total\n'))
     partial = int(raw_input('Enter the partial\n'))
     your_points = int(raw_input('Enter your points\n'))
     his_points = int(raw_input('Enter his points\n'))
     #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print-with-format不起作用，执行时会报告此错误：IndexError: tuple index out of range。最后一个打印（未注释），工作正常。我在Python中阅读了许多格式字符串的例子，我无法理解为什么我的代码无效。

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{}，然后没有剩余的项目留给下一个。print '{} {} {}'.format(*goodDifference(total, partial, your_points, his_points))。要将元组作为单独的参数传递，unpack它：

{{1}}

Answer 2

为什么不打印元组中的值？

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

Python，打印格式为元组，无法正常工作

2 个答案: