cement2 + drest

gistfile1.py

import drest
from cement2.core import foundation, controller
        
class VTController(controller.CementBaseController):
    class Meta:
        label = 'base'
        arguments = [
            ( ['-f', '--foo'], dict(help='foo option', dest='foo'))
            ]
        config_section = 'base'
        config_defaults = dict(
            foo='bar',
            api_endpoint='http://localhost:8000/api/v1/',
            )

    def __init__(self, *args, **kw):
        super(VTController, self).__init__(*args, **kw)
        self.api = None
        
    def _setup(self, app_obj):
        super(VTController, self)._setup(app_obj)
        
        # create the api using your config [base] -> api_endpoint setting
        self.api = drest.api.TastyPieAPI(
            self.app.config.get('base', 'api_endpoint')
            )
        
    @controller.expose(help='this is the default command', hide=True)
    def default(self):
        print('Inside base.default.')
        
        # prints foo config option, overridden by --foo
        print self.app.config.get('base', 'foo') 
        
        # checks that --foo was passed
        if self.app.pargs.foo:
            print('--foo option was passed')
    
    @controller.expose(help='some other command')
    def my_command(self):
        pass

class VTApp(foundation.CementApp):
    class Meta:
        label = 'version_tracker'
        base_controller = VTController    

try:    
    vt = VTApp()
    vt.setup()
    vt.run()
except drest.exc.dRestAPIError as e:
    print(e.msg)
finally:
    vt.close()

Config at ~/.version_tracker.conf

[base]
api_endpoint = http://localhost:8000/api/v1/

Run it:

$ python test.py 
Inside base.default.
bar


$ python test.py --foo asdfasfasdfa
Inside base.default.
asdfasfasdfa
--foo option was passed


$ python test.py --help
usage: test.py  -opt1 --opt2=VAL [arg1] [arg2] ...

Application Base Controller

commands:

  my-command
    some other command

optional arguments:
  -h, --help         show this help message and exit
  --debug            toggle debug output
  --quiet            suppress all output
  -f FOO, --foo FOO  foo option