Variable arguments for Subprocess call method in python

Question

I am trying to pass variables to call method (subprocess) as below:

def check(number):
    nodes = ["10.0.0.1","10.0.0.2"]
    nr=number
    for node in nodes:
        output=call(["ssh","-F","/home/config","user@",_node,","some_command",_nr])
        print output

The error when this function "check" is called is below:

NameError: global name '_node' is not defined

Can you please help me?

Why are you passing in _node & _nr? Shouldn't you be passing in node & nr? — mikea, May 09 '16 at 14:09
Your problem is a lot more fundamental than anything to do with `subprocess`. Start smaller: try building up the list that you intend to pass to `call`, and verify that that list looks the way you think it should look before proceeding. You'll find you probably need to learn a few things about working with strings (maybe look for tutorials on concatenating and formatting strings in Python).\ — jez, May 09 '16 at 14:14
`user@node` would have to be one argument, or use `"-u", user, node` to specify the user and remote host separately. — chepner, May 09 '16 at 14:14

score 3 · Accepted Answer · answered May 09 '16 at 14:10

3

You never define _node. You define node and nodes but never _node. I also don't see where you define _nr.

answered May 09 '16 at 14:10

gr1zzly be4r

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I was referring to the post http://stackoverflow.com/questions/4795190/pass-variable-to-subprocess-call-in-python when writing the code! thank you :) – Ardit May 09 '16 at 14:12
Be very careful when doing something like that :). – gr1zzly be4r May 09 '16 at 14:38

Variable arguments for Subprocess call method in python

1 Answers1