Python tarfile 进度输出?

问题描述

我正在使用以下代码提取 tar 文件:

I'm using the following code to extract a tar file:

import tarfile
tar = tarfile.open("sample.tar.gz")
tar.extractall()
tar.close()

但是，我想以目前正在提取的文件的形式密切关注进度.我该怎么做?

However, I'd like to keep tabs on the progress in the form of which files are being extracted at the moment. How can I do this?

额外奖励积分:是否也可以创建一定比例的提取过程?我想将它用于 tkinter 来更新进度条.谢谢！

EXTRA BONUS POINTS: is it possible to create a percentage of the extraction process as well? I'd like to use that for tkinter to update a progress bar. Thanks!

推荐答案

文件进度和全局进度:

import io
import os
import tarfile

def get_file_progress_file_object_class(on_progress):
    class FileProgressFileObject(tarfile.ExFileObject):
        def read(self, size, *args):
            on_progress(self.name, self.position, self.size)
            return tarfile.ExFileObject.read(self, size, *args)
    return FileProgressFileObject

class TestFileProgressFileObject(tarfile.ExFileObject):
    def read(self, size, *args):
        on_progress(self.name, self.position, self.size)
        return tarfile.ExFileObject.read(self, size, *args)

class ProgressFileObject(io.FileIO):
    def __init__(self, path, *args, **kwargs):
        self._total_size = os.path.getsize(path)
        io.FileIO.__init__(self, path, *args, **kwargs)

    def read(self, size):
        print("Overall process: %d of %d" %(self.tell(), self._total_size))
        return io.FileIO.read(self, size)

def on_progress(filename, position, total_size):
    print("%s: %d of %s" %(filename, position, total_size))

tarfile.TarFile.fileobject = get_file_progress_file_object_class(on_progress)
tar = tarfile.open(fileobj=ProgressFileObject("a.tgz"))
tar.extractall()
tar.close()

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