python-删除文件的特定行

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()