python去掉空白行的多种实现代码

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# -*- 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:
  if line.split():
   outfopen.writelines(line)
  else:
   outfopen.writelines("")

 infopen.close()
 outfopen.close()

delblankline("jb51.txt", "o.txt")

# -*- 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("jb51.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])