本地网络(linux-> linux)中的python复制文件并输出 [英] python copy file in local network (linux -> linux) and output

问题描述

我正在尝试编写脚本以从台式机复制RaspberryPi中的文件. 这是我的代码:(一部分)

I'm trying to write a script to copy files in my RaspberryPi, from my Desktop PC. Here is my code: (a part)

print "start the copy"   
path_pi = '//192.168.2.2:22/home/pi/Stock/'
file_pc = path_file + "/" + file
print "the file to copy is: ", file_pc

shutil.copy2(file_pc, path_pi + file_pi)

实际上我有此错误:(法语)

Actually I have this error: (in french)

IOError: [Errno 2] Aucun fichier ou dossier de ce type: '//192.168.2.2:22/home/pi/Stock/exemple.txt'

那么，我该如何进行?尝试复制之前，我必须连接两台机器吗? 我尝试过:

So, how could I proceed? Must I connect the 2 machines before trying to copy? I have tryed with:

path_pi = r'//192.168.2.2:22/home/pi/Stock'

但是问题是一样的. (而file_pc是一个变量)

But the problem is the same. (And file_pc is a variable)

谢谢

好的，我找到了:

command = 'scp', file_pc, file_pi  
p = subprocess.Popen(command, stdout=subprocess.PIPE) 

但是无法获得输出...(使用Shell = False)

But no way to have the output... (work with Shell=False)

推荐答案

shutil.copy2()适用于本地文件. 192.168.2.2:22建议您要通过ssh复制文件.您可以将远程目录(RaspberryPi)安装到台式计算机(sshfs)上的本地目录中，以便shutil.copy2()可以正常工作.

shutil.copy2() works with local files. 192.168.2.2:22 suggests that you want to copy files over ssh. You could mount the remote directory (RaspberryPi) onto a local directory on your desktop machine (sshfs) so that shutil.copy2() would work.

如果要查看命令的输出，则不要设置stdout=PIPE(注意:如果设置stdout=PIPE，则应从p.stdout中读取，否则该过程可能会永远阻塞):

If you want to see the output of a command then don't set stdout=PIPE (note: if you set stdout=PIPE then you should read from p.stdout otherwise the process may block forever):

from subprocess import check_call

check_call(['scp', file_pc, file_pi])

scp将打印到您的父Python脚本打印的任何位置.

scp will print to whatever places your parent Python script prints.

要以字符串形式获取输出:

To get the output as a string:

from subprocess import check_output

output = check_output(['scp', file_pc, file_pi])

但是，如果重定向输出，默认情况下scp不会显示任何内容.

Though It looks like scp doesn't print anything by default if the output is redirected.

您可以使用pexpect使scp认为它在终端中运行:

You could use pexpect to make scp think that it runs in a terminal:

import pipes
import re
import pexpect # $ pip install pexpect

def progress(locals):
    # extract percents
    print(int(re.search(br'(\d+)%[^%]*$', locals['child'].after).group(1)))

command = "scp %s %s" % tuple(map(pipes.quote, [file_pc, file_pi]))
status = pexpect.run(command, events={r'\d+%': progress}, withexitstatus=1)[1]
print("Exit status %d" % status)

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