改变多行文本字符串的缩进
任务:
有个包含多行文本的字符串,需要创建该字符串的一个拷贝。并在每行行首添加或者删除一些空格,以保证每行的缩进都是指定数目的空格数。
解决方案:
# -*- coding: UTF-8 -*- ''' Created on 2014年8月29日 path:E:Secore_pythonsrc @author: Administrator function: 改变多行文本字符串的缩进 ''' def reindent(s,numSpaces): leading_space = numSpaces * ' ' lines = [leading_space + line.strip() for line in s.splitlines(True)] # return ''.join(lines) return ' '.join(lines) if __name__ == "__main__": x='''hello python I love ''' print reindent(x,4) pass ''' Python中的splitlines用来分割行。当传入的参数为True时,表示保留换行符 。通过下面的例子就很明白了 mulLine = """Hello!!! Wellcome to Python's world! There are a lot of interesting things! Enjoy yourself. Thank you!""" print ''.join(mulLine.splitlines()) print '------------' print ''.join(mulLine.splitlines(True)) 运行结果: Hello!!! Wellcome to Python's world! There are a lot of interesting things! Enjoy yourself. Thank you! ------------ Hello!!! Wellcome to Python's world! There are a lot of interesting things! Enjoy yourself. Thank you! '''
扩展和压缩制表符
任务:
将字符串中的制表符转化成一定数目的空格,或者反其道而行之。
解决方案: