有一次需要删除一些 html 文件中的统计链接,
通过用遍历文本的每行, 然后正则查找网址, 使用下面的函数删除行.
删除文本文件的特定行
- def removeLine(filename, lineno):
- fro = open(filename, "r",encoding='UTF-8')
- current_line = 0
- while current_line < lineno:
- fro.readline()
- current_line += 1
- seekpoint = fro.tell()
- frw = open(filename, "r+")
- frw.seek(seekpoint, 0)
- # read the line we want to discard
- fro.readline() # 读入一行进内存 , 同时 文件指针下移实现删除
- # now move the rest of the lines in the file
- # one line back
- chars = fro.readline()
- while chars:
- frw.writelines(chars)
- chars = fro.readline()
- fro.close()
- frw.truncate()
- frw.close()
来源: http://www.bubuko.com/infodetail-2578232.html