读取同一文件Python的多次行[重复]

Question

我试图在 Python 中多次读取某些文件的行。

我正在使用这种基本方式：

 with open(name, 'r+') as file:
                for line in file:
                    # Do Something with line

这很好，但是如果我想在我仍然打开文件的情况下对每一行进行第二次迭代：

 with open(name, 'r+') as file:
                for line in file:
                    # Do Something with line
                for line in file:
                    # Do Something with line, second time

然后它不起作用，我需要打开，然后关闭，然后再次打开我的文件以使其工作。

with open(name, 'r+') as file:
                    for line in file:
                        # Do Something with line
with open(name, 'r+') as file:
                    for line in file:
                        # Do Something with line

感谢您的回答！

Answer 1

使用file.seek() 跳转到文件中的特定位置。但是，考虑一下是否真的有必要再次遍历文件。也许有更好的选择。

with open(name, 'r+') as file:
    for line in file:
        # Do Something with line
    file.seek(0)
    for line in file:
        # Do Something with line, second time