Why not use subprocess with Net-SNMP shell instead of using pysnmp?

[xx-zhang]

I have trid it like snmpget/snmpwalk and get the result string, then make it format by what I want in regex.

I have a question: what is the condition when I should use pynmap? What's the advantage of pysnmp over running snmpwalk in a subprocess?

[etingof]

Well, running external program usually involves some complications:

• You need to prepare input and, most importantly, consume the output which can change abruptly because it might be designed for humans
• You can't easily parallelize queries beyond a couple of hundreds because running so many processes becomes prohibitively expensive
• Portability

But, on the other hand, running machine code on the bare metal is definitely much faster than running it on top of Python VM.

So it all depends on your use-case.