如何将星号传递给模块“ sh”？在python中？ [英] How to pass an asterisk to module "sh" in python?

问题描述

我正在python中使用 sh模块，以便在Linux上调用外部命令。在我的特殊情况下，我想调用 du命令，因为它比手动执行这种计算更为有效。不幸的是，以下行不起作用：

I'm using the "sh" module in python in order to call external commands on Linux. In my particular case I would like to call the "du" command because it is more efficient than doing such calculations "by hand". Unfortunately the following line does not work:

output = sh.du('-sx', '/tmp/*')

但这确实有效：

output = sh.du('-sx', '/tmp/')

如果通过星号，则会收到以下错误消息：

If I pass an asterisk I get the following error message:

'ascii' codec can't encode character u'\u2018' in position 87: ordinal not in range(128)

有人知道如何

根据请求，这里是堆栈跟踪：

As requested, here is the stack trace:

Traceback (most recent call last):
  File "./unittest.py", line 33, in <module>
    output = sh.du('-sx', '/tmp/*')
  File "/usr/local/lib/python2.7/dist-packages/sh.py", line 1021, in __call__
    return RunningCommand(cmd, call_args, stdin, stdout, stderr)
  File "/usr/local/lib/python2.7/dist-packages/sh.py", line 486, in __init__
    self.wait()
  File "/usr/local/lib/python2.7/dist-packages/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "/usr/local/lib/python2.7/dist-packages/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_1

推荐答案

答案是：

我忘记了星号处理是由bash本身完成的，而不是由 du完成的。这意味着： sh的行为确实正确且完全符合人们的预期。它直接将 / tmp / *传递给 du（但bash不会）。这就是Padraic Cunningham想要告诉我的。

I forgot that asterisk processing is done by bash itself, not by "du". Which means: "sh" indeed behaves correcly and exactly as one should expect. It passes "/tmp/*" directly to "du" (but bash does not). That's what Padraic Cunningham tried to tell me.

因此，唯一有效的方法就是用户rmn描述的方法：

Therefor the ONLY correct way to do what I'm trying to do is the way the user rmn described:

sh.du('-sx', sh.glob('/tmp/*'))

这正是bash shell本身在调用 du时所做的事情。

And this is exactly what the bash shell itself does when calling "du".

这篇关于如何将星号传递给模块“ sh”？在python中？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！