gistfile1.py

import os
from django.core.management.base import NoArgsCommand
from optparse import make_option

def start_plain_shell():
    import code
    # Set up a dictionary to serve as the environment for the shell, so
    # that tab completion works on objects that are imported at runtime.
    # See ticket 5082.
    imported_objects = {}
    try: # Try activating rlcompleter, because it's handy.
        import readline
    except ImportError:
        pass
    else:
        # We don't have to wrap the following import in a 'try', because
        # we already know 'readline' was imported successfully.
        import rlcompleter
        readline.set_completer(rlcompleter.Completer(imported_objects).complete)
        readline.parse_and_bind("tab:complete")

    # We want to honor both $PYTHONSTARTUP and .pythonrc.py, so follow system
    # conventions and get $PYTHONSTARTUP first then import user.
    pythonrc = os.environ.get("PYTHONSTARTUP") 
    if pythonrc and os.path.isfile(pythonrc): 
        try: 
            execfile(pythonrc) 
        except NameError: 
            pass
    # This will import .pythonrc.py as a side-effect
    import user
    code.interact(local=imported_objects)

class Command(NoArgsCommand):
    option_list = NoArgsCommand.option_list + (
        make_option('--plain', action='store_true', dest='plain',
            help='Tells Django to use plain Python, not bpython.'),
        make_option('--bpython', action='store_true', dest='bpython',
            help='Tells Django to use bpython.'),
    )
    help = "Runs a Python interactive interpreter. Tries to use bpython, if it's available."

    requires_model_validation = False

    def handle_noargs(self, **options):
        # XXX: (Temporary) workaround for ticket #1796: force early loading of all
        # models from installed apps.
        from django.db.models.loading import get_models, get_apps
        loaded_models = get_models()
        # Set up a dictionary to serve as the environment for the shell, so
        # that tab completion works on objects that are imported at runtime.
        # See ticket 5082.
        from django.conf import settings
        imported_objects = {'settings': settings}
        for app_mod in get_apps():
            app_models = get_models(app_mod)
            if not app_models:
                continue
            model_labels = ", ".join([model.__name__ for model in app_models])
            print self.style.SQL_COLTYPE("From '%s' autoload: %s" % (app_mod.__name__.split('.')[-2], model_labels))
            for model in app_models:
                try:
                    imported_objects[model.__name__] = getattr(__import__(app_mod.__name__, {}, {}, model.__name__), model.__name__)
                except AttributeError, e:
                    print self.style.ERROR_OUTPUT("Failed to import '%s' from '%s' reason: %s" % (model.__name__, app_mod.__name__.split('.')[-2], str(e)))
                    continue
        try:
            from bpython import embed
            embed(imported_objects)
        except ImportError:
            start_plain_shell()