how to handle interactive shell in fabric python

Question

1.after executing expect('OPR>','show alef-users') it go to infinite means it run continuesly.

from fabric.api import *
from fabric.context_managers import settings
from ilogue.fexpect import expect, expecting, run

prompts = []
prompts += expect('Username:','kirti')
prompts += expect('Password:','kirti')
prompts += expect('OPR>','show users')
prompts +=expect('OPR>','exit')
env.password = "kirti@123"
with cd('/home/kirti/opr'):
with expecting(prompts):
run('./kirti', combine_stderr=False)

when i run this code then it go in infinite means it go again an again expect('OPR>','show opr-users) it doesn't go to next expect('OPR>','exit') — kirti kumbhar
– kirti kumbhar, Commented Nov 23, 2017 at 9:07
You should simply add your code to the body of your question, via the edit link. It's hard to make heads or tales when it's this malformed. — Neil
– Neil, Commented Nov 23, 2017 at 9:08

Ismaïl Mourtada · Accepted Answer · 2018-03-16 18:28:15Z

1

Fabric >= 1.9 allows to handle multiple prompts at the same time, in a single with clause: you just have use Fabric's settings function, and feed it with a dict; the keys will be the questions, and the values will be the answers. In your case, it will look like :

with settings(prompts={'Username:':'admin', 
                       'Password:':'admin', 
                       'OPR>':'show alef-users', 
                       'OPR>':'exit'}):
    run('./go_opr_cli', combine_stderr=False)

My answer is inspired by that section of Fabric's official documentation. It worked very well for me, but make sure, when writing the dict's keys, that you respect the number of spaces between the last character of the question and the cursor, in the command line, otherwise it will fail.

Example: The last prompt is 'OPR>'. If you see in the regular Linux CLI, that there is one space between 'OPR>' and the cursor, then the key should be 'OPR> '

edited Mar 16, 2018 at 18:28

answered Dec 9, 2017 at 19:51

Ismaïl Mourtada

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2 Comments

user3167654 Over a year ago

small typo in your prompts dictionary, there should be a colon between the key and value

Lutz Prechelt Over a year ago

Two entries with the same key in the same dictionary? What is that supposed to mean? Only the last of these will actually exist in the dictionary.

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