呼叫“mv”来自带有通配符的 Python Popen

发布于 2024-12-05 12:50:23 字数 903 浏览 1 评论 0原文

我似乎无法使用通配符从 Python subprocess.Popen 获取“mv”命令。

代码：

def moveFilesByType(source, destination, extension):
    params = [] 
    params.append("mv")
    params.append(source + "/*." + extension)       
    params.append(destination + "/") 

    print params

    pipe = subprocess.Popen(params, shell=True, stdout=PIPE)
    result, err = pipe.communicate()

    return result

print params 的输出：

    ['mv', '/full_path_to_folder_source/*.nib', '/full_path_to_folder_target/']

这里的路径被缩短只是为了便于阅读，但我保证它们是有效的。从终端调用这个完全相同的命令是可行的，但在 python 中调用会给出有关 mv 的不正确使用的标准消息：

usage: mv [-f | -i | -n] [-v] source target
       mv [-f | -i | -n] [-v] source ... directory

我读到为了使通配符起作用，我需要参数 shell= Popen 调用中存在 True。有什么想法为什么这行不通吗？删除 shell=True 最终会按照预期将星号视为硬文字。

原文

I can't seem to get the 'mv' command to work from Python subprocess.Popen with a wildcard.

The code:

def moveFilesByType(source, destination, extension):
    params = [] 
    params.append("mv")
    params.append(source + "/*." + extension)       
    params.append(destination + "/") 

    print params

    pipe = subprocess.Popen(params, shell=True, stdout=PIPE)
    result, err = pipe.communicate()

    return result

The output from print params:

    ['mv', '/full_path_to_folder_source/*.nib', '/full_path_to_folder_target/']

The paths here are shortened just for readability, but I assure that they are valid. Calling this exact same command from a terminal works but calling in python gives the standard message about improper use of mv:

usage: mv [-f | -i | -n] [-v] source target
       mv [-f | -i | -n] [-v] source ... directory

I read that in order for wildcards to work, I would need the parameter shell=True in the Popen call, which is present. Any ideas why this doesn't work? Removing shell=True ends up treating the asterisks as hard literals as expected.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

月依秋水 2024-12-12 12:50:23

使用字符串而不是数组：

params = "mv /full_path_to_folder_source/*.nib /full_path_to_folder_target/"

当您通过数组形式指定参数时，参数 '/full_path_to_folder_source/*.nib' 将传递给 mv。您想要强制 bash 展开参数，但 Popen 不会通过 shell 传递每个参数。

Use a string instead of an array:

params = "mv /full_path_to_folder_source/*.nib /full_path_to_folder_target/"

When you specify arguments via the array form, the argument '/full_path_to_folder_source/*.nib' is passed to mv. You want to force bash to expand the argument, but Popen won't pass each argument through the shell.

回复收藏 0 原文

夜灵血窟げ 2024-12-12 12:50:23

您可以在不启动新进程的情况下使用模块shutil 和 glob 来完成此操作：

import glob
import shutil

def moveFilesByType(source, destination, extension):
    for path in glob.glob(source + "/*." + extension):
        shutil.move(path, destination)

You can do it without starting a new process using modules shutil and glob:

import glob
import shutil

def moveFilesByType(source, destination, extension):
    for path in glob.glob(source + "/*." + extension):
        shutil.move(path, destination)

回复收藏 0 原文