Linux 如何在python中获取（MB）文件中tar.gz的大小
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How to get the size of tar.gz in (MB) file in python
提问by Mahakaal
I am doing backups in python script but i need to get the size of tar.gz file created in MB
我正在用 python 脚本进行备份，但我需要获取以 MB 为单位创建的 tar.gz 文件的大小
How can i get the size in MB of that file
我如何获得该文件的大小（以 MB 为单位）
采纳答案by Mark Longair
It's not clear from your question whether you want to the compressed or uncompressed size of the file, but in the former case, it's easy with the os.path.getsizefunction from the os module
从您的问题中不清楚您是想要文件的压缩大小还是未压缩大小，但在前一种情况下，使用os 模块中的os.path.getsize函数很容易
>>> import os
>>> os.path.getsize('flickrapi-1.2.tar.gz')
35382L
To get the answer in megabytes you can shift the answer right by 20, e.g.
要获得以兆字节为单位的答案，您可以将答案右移 20，例如
os.path.getsize('large.tar.gz') >> 20
Although that operation will be done in integers - if you want to preserve fractions of a megabyte, divide by (1024*1024.0)instead. (Note the .0so that the divisor will be a float.)
尽管该操作将以整数完成 - 如果您想保留兆字节的分数，请(1024*1024.0)改为除以。（注意.0使除数成为浮点数。）
Update:In the comments below, Johnsywebpoints out a useful recipe for more generally producing human readable representations of file sizes.
更新：在下面的评论中，Johnsyweb指出了一个有用的方法，可以更普遍地生成人类可读的文件大小表示。
回答by Keith
Use the os.stat()function to get a stat structure. The st_sizeattribute of that is the size of the file in bytes.
使用该os.stat()函数获取统计结构。它的st_size属性是以字节为单位的文件大小。
回答by chl
According to Python on-line docs, you should look at the sizeattributes of a TarInfoobject.
根据 Python在线文档，您应该查看对象的size属性TarInfo。
