Golang equivalent of Python's struct.pack / struct.unpack
<p>In Python, using the <code>struct</code> module, I can do something like this to get a packed representation of a value as a string:</p>

<pre><code>import struct
print struct.pack('L', 64)
"@\x00\x00\x00\x00\x00\x00\x00"
struct.unpack('L', '@\x00\x00\x00\x00\x00\x00\x00')
(64,)
</code></pre>

<p>I'd like to do something similar in Go, except I'm a little unclear on how to do so. I know I can do something like this:</p>

<pre><code>import (
    "encoding/binary"
    "fmt"
)

bs := make([]byte, 8)
binary.PutUvarint(bs, uint64(64))
fmt.Printf("%s", bs)
"@"
</code></pre>

<p>But that's very different and probably not what I want.</p>