Question

我正在使用以下代码提取tar文件：

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

但是，我想密切关注目前正在提取哪些文件的进度。我怎么能这样做？

额外奖励积分：是否有可能创造一定比例的提取过程？我想用它来为tkinter更新进度条。谢谢！

Answer 1

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()

Answer 2

您可以在members

中指定extractall()参数

with tarfile.open(<path>, 'r') as tarball:
   tarball.extractall(path=<some path>, members = track_progress(tarball))

def track_progress(members):
   for member in members:
      # this will be the current file being extracted
      yield member

member是TarInfo个对象，请参阅所有可用的函数和属性here

Answer 3

您可以使用extract代替extractall - 您可以在提取时打印成员名称。要获取成员列表，您可以使用getmembers。

可以在此处找到文本进度条库：

http://code.google.com/p/python-progressbar/

Tkinter片段：

http://tkinter.unpythonic.net/wiki/ProgressBar

Answer 4

这里有一个很酷的解决方案，它会覆盖tarfile模块作为替代品，并允许您指定要更新的回调。

https://github.com/thomaspurchas/tarfile-Progress-Reporter/

根据评论更新

Answer 5

要查看当前正在提取的文件，以下内容对我有用：

import tarfile

print "Extracting the contents of sample.tar.gz:"
tar = tarfile.open("sample.tar.gz")

for member_info in tar.getmembers():
    print "- extracting: " + member_info.name
    tar.extract(member_info)

tar.close()

Answer 6

您可以只使用tqdm()并打印要提取的文件数量的进度：

import tarfile
from tqdm import tqdm

# open your tar.gz file
with tarfile.open(name=path) as tar:

    # Go over each member
    for member in tqdm(iterable=tar.getmembers(), total=len(tar.getmembers())):

        # Extract member
        tar.extract(member=member)

Python tarfile进度输出？

6 个答案: