python去掉空白行的多种实现代码

# -*- coding: utf-8 -*-

'''

python读取文件，将文件中的空白行去掉

'''

def delblankline(infile, outfile):

 infopen = open(infile, 'r',encoding="utf-8")

 outfopen = open(outfile, 'w',encoding="utf-8")

 lines = infopen.readlines()

 for line in lines:

  line = line.strip()

  if len(line)!=0:

   outfopen.writelines(line)

   outfopen.write('\n')

 infopen.close()

 outfopen.close()

delblankline("php.txt", "o2.txt")

#coding:utf-8

import sys

def delete(filepath):

 f=open(filepath,'a+')

 fnew=open(filepath+'_new.txt','wb')   #将结果存入新的文本中

 for line in f.readlines():         #对每一行先删除空格，\n等无用的字符，再检查此行是否长度为0

  data=line.strip()

  if len(data)!=0:

   fnew.write(data)

   fnew.write('\n')

 f.close()

 fnew.close()

if __name__=='__main__':

 if len(sys.argv)==1:

  print u"必须输入文件路径，最好不要使用中文路径"

 else:

  delete(sys.argv[1])