Question

I’ve been playing with Fabric.

With a hello world program:

def hello(name="world"):
    print("hello %s!" % name)

if __name__ == '__main__':
    import sys
    from fabric.main import main
    sys.argv = ['fab', '-f', __file__,] + sys.argv[1:]
    main()

I can pass the argument hello:name=quanta and get the “hello quanta! result.

But with a below script:

from fabric.api import run

def hostname(host="localhost"):
    run("hostname")

if __name__ == '__main__':
    import sys
    from fabric.main import main
    sys.argv = ['fab', '-f', __file__,] + sys.argv[1:]
    main()

I got the errors:

Fatal error: Command(s) not found:
hostname

Aborting.

when passing hostname:host=192.168.3.118 as a argument within PyDev.

It’s working fine from the command line:

$ fab -f hostname.py hostname:host=192.168.3.118
[192.168.3.118] Executing task 'hostname'
[192.168.3.118] run: hostname
[192.168.3.118] out: SVR040-3118.localdomain
[192.168.3.118] out: 

Done.
Disconnecting from 192.168.3.118... done.

It’s also happen with the env dictionary, something like this:

from fabric.api import run, env

env.hosts = ['192.168.3.118', '192.168.6.142']

def hostname():
    run("hostname")

if __name__ == '__main__':
    import sys
    from fabric.main import main
    sys.argv = ['fab', '-f', __file__,] + sys.argv[1:]
    main()

although running it from the command line gets the expected results:

$ fab -f hostname.py hostname
[192.168.3.118] Executing task 'hostname'
[192.168.3.118] run: hostname
[192.168.3.118] out: SVR040-3118.localdomain
[192.168.3.118] out: 
[192.168.6.142] Executing task 'hostname'
[192.168.6.142] run: hostname
[192.168.6.142] out: SVR040-6142
[192.168.6.142] out: 

Done.
Disconnecting from 192.168.6.142... done.
Disconnecting from 192.168.3.118... done.

Answer 1

Sorry, my silly error.

I’m a Eclipse newcomer.

My source code structure is something like this:

src/
├── hello.py
├── hello.pyc
├── hostname.py
├── hostname.pyc

Every Python files have own Run configuration. When I open the hostname.py file and click on the play button (NOT the down arrow), it is actually running with the hello configuration, this is reason for the above errors.

To create a new Python run:
right click on the file -> Run As -> Run Configurations -> right click on Python Run -> new -> naming it, chose the right Project and Main Module -> switch to Arguments tab -> Set the ${string_prompt} for Program Arguments if you want -> Apply and Run.

For the later run, you can simply chose the right configuration from the down arrow (beside the play button).