如何用纯Python表达这个Bash命令
我在一个有用的 Bash 脚本中有这一行,但我还没有设法将其翻译成 Python,其中“a”是用户输入的要归档的文件的天数:
find ~/podcasts/current -mindepth 2 -mtime '+`a`+' -exec mv {} ~/podcasts/old \;
我熟悉 os.name 和 getpass。 getuser 用于最通用的跨平台元素。 我还有这个函数来生成相当于 ~/podcasts/current 中所有文件的全名列表:
def AllFiles(filepath, depth=1, flist=[]):
fpath=os.walk(filepath)
fpath=[item for item in fpath]
while depth < len(fpath):
for item in fpath[depth][-1]:
flist.append(fpath[depth][0]+os.sep+item)
depth+=1
return flist
首先,必须有更好的方法来做到这一点,欢迎任何建议。 无论哪种方式,例如,“AllFiles('/users/me/music/itunes/itunes music/podcasts')”都会在 Windows 上给出相关列表。 想必我应该能够查看这个列表并调用 os.stat(list_member).st_mtime 并将所有早于特定天数的内容移至存档; 我对这一点有点卡住了。
当然,任何带有 bash 命令简洁的内容也很有启发性。
I have this line in a useful Bash script that I haven't managed to translate into Python, where 'a' is a user-input number of days' worth of files to archive:
find ~/podcasts/current -mindepth 2 -mtime '+`a`+' -exec mv {} ~/podcasts/old \;
I am familiar with the os.name and getpass.getuser for the most general cross-platform elements. I also have this function to generate a list of the full names of all the files in the equivalent of ~/podcasts/current:
def AllFiles(filepath, depth=1, flist=[]):
fpath=os.walk(filepath)
fpath=[item for item in fpath]
while depth < len(fpath):
for item in fpath[depth][-1]:
flist.append(fpath[depth][0]+os.sep+item)
depth+=1
return flist
First off, there must be a better way to do that, any suggestion welcome. Either way, for example, "AllFiles('/users/me/music/itunes/itunes music/podcasts')" gives the relevant list, on Windows. Presumably I should be able to go over this list and call os.stat(list_member).st_mtime and move all the stuff older than a certain number in days to the archive; I am a little stuck on that bit.
Of course, anything with the concision of the bash command would also be illuminating.
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这不是 Bash 命令,而是
find
命令。 如果你真的想将它移植到 Python 上,这是可能的,但你永远无法编写如此简洁的 Python 版本。find
经过 20 多年的优化,在文件系统操作方面表现出色,而 Python 是一种通用编程语言。That's not a Bash command, it's a
find
command. If you really want to port it to Python it's possible, but you'll never be able to write a Python version that's as concise.find
has been optimized over 20 years to be excellent at manipulating filesystems, while Python is a general-purpose programming language.会给你时间。 我建议修复
walk_results[2]
中的这些问题,然后递归调用walk_results[1]
中每个目录的函数。Will give you the mtime. I suggest fixing those in
walk_results[2]
, and then recursing, calling the function for each dir inwalk_results[1]
.这不是开玩笑。 这个 python 脚本将完全执行 bash 脚本所做的事情。
编辑:删除最后一个参数上的反斜杠,因为不需要它。
That is not a joke. This python script will do exactly what the bash one does.
EDIT: Dropped the backslash on the last param because it is not needed.