Python中的splitlines 的一点说明

    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：

复制代码 代码如下:
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)))