我们格式化构建字符串可以有3种方法:1 元组占位符m = 'python'astr = 'i love %s' % mprint astr2 字符串的format方法m = 'python'astr = "i love {python}".format(python=m)print astr3 字典格式化字符串m = 'python'astr = "i love %(python)s " % {'python':m}print astr