新手求助 中文字符串对齐问题 - V2EX
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yundanfengqing

新手求助 中文字符串对齐问题

  •  
  •   yundanfengqing
    yundanfengqing Oct 10, 2013 6611 views
    This topic created in 4590 days ago, the information mentioned may be changed or developed.
    代码如下
    #-*-coding:gbk-*-
    width = input('请输入宽度:')

    price_width = 10
    item_width = width - price_width

    header_format = '%-*s%*s'
    format = '%-*s%*.2f'

    print '=' * width

    print header_format %(item_width,'项目',price_width,'价格')

    print '-' * width

    print format %(item_width,'苹果',price_width,0.40)
    print format %(item_width,'鸭梨',price_width,0.50)
    print format %(item_width,'哈密瓜',price_width,1.92)
    print format %(item_width,'干杏仁',price_width,8)
    print format %(item_width,'西梅干干干',price_width,12)

    print '=' * width

    显示如下

    为什么后面对不齐呢
    3 replies    1970-01-01 08:00:00 +08:00
    spoony
        1
    spoony  
       Oct 10, 2013
    西梅干干干
    貌似干的越多越对不齐
    vibbow
        2
    vibbow  
       Oct 10, 2013
    用等宽字符啊亲
    phyng
        3
    phyng  
       Oct 11, 2013
    终于弄明白了orz,2楼正解
    简单解释就是:中文字符在字符占用上相当于两个英文字符,但是字体设计上,一般一个中文字符的宽度不会等于两个英文字符的宽度,所以打印出来的效果有偏差,但是等宽字符一个中文字体的宽度刚好等于两个英文字符宽度,所以正常:

    非等宽字体比如我用的Yahei Console字体就是这样:

    注意观察一个中文字符的宽度不等于两个英文字符。
    另外,format = '%-*s%*.2f',这种格式化是比较旧的Python版本了(http://docs.python.org/release/2.5.2/lib/typesseq-strings.html),2.7及以后渐渐抛弃这种语法。
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