Python天天美味(14) - splitlines

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 \n。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))

输出结果：
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!

利用这个函数，就可以非常方便写一些段落处理的函数了，比如处理缩进等方法。如Cookbook书中的例子：

def addSpaces(s, numAdd):

white = " "*numAdd

return white + white.join(s.splitlines(True))

def numSpaces(s):

return [len(line)-len(line.lstrip( )) for line in s.splitlines( )]

def delSpaces(s, numDel):

if numDel > min(numSpaces(s)):

raise ValueError, "removing more spaces than there are!"

return '\n'.join([ line[numDel:] for line in s.splitlines( ) ])

def unIndentBlock(s):

return delSpaces(s, min(numSpaces(s)))