python，pexpect：sendline（）在发送文本时添加了意外的空格

Question

I am using python=2.7 and pexpect=4.5.0 on ubuntu 16.04

This is the code:

telnet.sendline("ls --color=never | grep -v bootimage | xargs -n1 rm -rf")

I'm sending this line to an embedded linux machine from my ubuntu computer, i'm in a virutalenv.

However, what this embedded machine gets is:

ls --color=never | grep -v bootimage | xar gs -n1 rm -rf

I mean, why does xargs become xar gs ...??? How do I fix it?

Note: 1. I also send other shorter commands, they are good. 2. It used to be good. This does not happen consistently.

Answer 1

使用原始字符串可能是更好的选择，例如telnet.sendline(r"ls --color=never | grep -v bootimage | xargs -n1 rm -rf")