测试代码 jb51.txt

1:www.jb51.net

2:www.jb51.net

3:www.jb51.net

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7:www.jb51.net

8:www.jb51.net

9:www.jb51.net

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16:www.jb51.net

python代码

代码一

# -*- 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")

代码二

# -*- 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")

代码三：python2

#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])

效果图

代码解析：

1. python split()通过指定分隔符对字符串进行切片,返回分割后的字符串列表。str.split()分隔符默认为空格。

2. 函数 writelines(list)

函数writelines可以将list写入到文件中，但是不会在list每个元素后加换行符，所以如果想每行都有换行符的话需要自己再加上。

例如：for line in lines:

outfopen.writelines(line+"\n")

3. .readlines() 自动将文件内容分析成一个行的列表，该列表可以由 python 的 for ... in ... 结构进行处理。

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