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Using subprocess with fab in python

I am new to Python and am trying to use a subprocess to run a script inside another script. I found several resources on the internet that were very close, but unfortunately did not help me run my code without errors.

Here's what I want to do: In my script1 (main script) I create a file fabfile.py (script2). This script2 or fabfile.py must be executed from script1. After some research I realized that execfile and os.systems are not good options, so I decided to use subprocess. (Ref: How can I make one python file another? )

Here's what I am doing but not working:

from os.path import expanduser
home = expanduser("~")
import os
os.getcwd() 
desk = "/Desktop"
path = str(home)+str(desk)
f = open("fabfile.py","w") # Creating a fabfile.py
f.write("from fabric.api import run \ndef task1(): \n    run('ls')")
import subprocess
host = raw_input("Enter the host IP with username e.g. root@10.0.0.2:")
p1 = subprocess.Popen(['fab', '-f path/fabfile.py', '-H host'],stdout=subprocess.PIPE)
output = p1.communicate()
print output

Note. In line

p1 = subprocess.Popen(['fab', '-f path/fabfile.py', '-H host'],stdout=subprocess.PIPE)

I've tried MANY different formats - placing quotes and double quotes, $

and %

for a variable, etc. and so on, but none of them work. Any idea what I am doing wrong? The examples I see are usually straightforward, without using variables as arguments.

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4 answers


  • Don't put python variables in line

  • Individual flags

    p1 = subprocess.Popen(['fab', '-f', path+'/fabfile.py', '-H', host],stdout=subprocess.PIPE)

  • When joining paths, it is better to use os.path.join ()

    fab_file = os.path.join(os.path.expanduser("~"), "Desktop", 'fabfile.py')


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I realized that there is another problem, that is, entering the password. Because even after fixing the problem with the variable, I get the error (different). I think, instead of using fab, I can just do,

from subprocess import Popen, PIPE 
host = raw_input("Enter the host IP with user e.g. root@10.0.0.2:") 
conn1 = Popen(['ssh',host,'ls'], stdin=PIPE) 
conn1.communicate('password')


Reference: Use subprocess to send password

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The code may not be 100% correct, but something like this should work

import fabric.api as api
from path.my-other-fabfile import my_ssh_connection_blah

api.ls()
host = raw_input("Enter the host IP with username e.g. root@10.0.0.2:")

env['host']=host
my_ssh_connection_blah()
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Python won't interpolate variables path

and host

for you, you need to do it explicitly.

Edit:

p1 = subprocess.Popen(['fab', '-f path/fabfile.py', '-H host'],stdout=subprocess.PIPE)

in

p1 = subprocess.Popen(['fab', '-f ' + path + '/fabfile.py', '-H ' + host],stdout=subprocess.PIPE)
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