python：从一个文件复制特定的行到另一个文件

Question

我有一个文件，我想从它复制只有特定的行到另一个文件。我试图创建一个功能：

def copytotemp(logfile, fromline, toline): 
    with open(logfile) as origfile: 
     with open("templog.log", "w") as tempfile: 
      for num, line in enumerate(origfile, 0): 
       if (num + 1) <= fromline and (num + 1) >= toline: 
        tempfile.write(line) 

但tempfile.log总是空空的。 谢谢

Answer 1

我有一个操作员的错误。

def copytotemp(logfile, fromline, toline): 
    with open(logfile) as origfile: 
     with open("templog.log", "w") as tempfile: 
      for num, line in enumerate(origfile, 1): 
       if num >= fromline and num <= toline: 
        tempfile.write(line) 

正在