<p>I want to write a program that will hop through a bunch of Cisco devices and do some basic configurations or pull configs from our TFTP server. I know this can be done in Python, using the pexpect module, for example.</p>
<p>Is it possible to do this in Go? I would love to write a Go script over python</p>
<hr/>**评论：**<br/><br/>nemith: <pre><p>It is sad that screen scraping ssh/telnet output is still a think in 2018. Try to find alternative, more automation friendly, interfaces like NETCONF, RESTCONF, Arista EAPI, etc and push on your vendors to support them.</p>
<p>For RESTCONF and Arista EAPI just a small wrapper around net/http.Client. For NETCONF I have wrote a (basic) library <a href="https://github.com/Juniper/go-netconf" rel="nofollow">https://github.com/Juniper/go-netconf</a>.</p>
<p>You can still fall back to screen scraping, but try alternatives first.</p>
<p>Go and Networks are perfect together. The concurrency makes automating a network of 100, 1,000, 10,000 or 100,000 devices very easy. </p></pre>HighWizardSully: <pre><blockquote>
<p>It is sad that screen scraping ssh/telnet output is still a think in 2018</p>
</blockquote>
<p>You're telling me! </p></pre>pdffs: <pre><p>Expect (the library that inspired pexpect) has been around for decades. There are quite a number of Expect implementations in Go to choose from, Google's implementation is one example:</p>
<p><a href="https://github.com/google/goexpect" rel="nofollow">https://github.com/google/goexpect</a></p>
<p>You can find alternatives by searching for 'golang expect'.</p></pre>Redundancy_: <pre><p>I've done something similar (cdb integration), but the concurrency and timeouts while managing a process can be challenging. There are some libraries that might help, although I haven't tried them: <a href="https://github.com/shavac/gexpect/blob/master/examples/ssh.go" rel="nofollow">https://github.com/shavac/gexpect/blob/master/examples/ssh.go</a></p>
<p>So there's no reason you can't, but YMMV.</p></pre>
