app/django/core/management/commands/shell.py
author Todd Larsen <tlarsen@google.com>
Fri, 18 Jul 2008 18:22:23 +0000
changeset 54 03e267d67478
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Major reorganization of the soc svn repo, to merge into a single App Engine image (to make development easier, now that only a single app will run all Google Open Source programs).
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import os
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from django.core.management.base import NoArgsCommand
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from optparse import make_option
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class Command(NoArgsCommand):
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    option_list = NoArgsCommand.option_list + (
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        make_option('--plain', action='store_true', dest='plain',
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            help='Tells Django to use plain Python, not IPython.'),
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    )
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    help = "Runs a Python interactive interpreter. Tries to use IPython, if it's available."
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    requires_model_validation = False
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    def handle_noargs(self, **options):
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        # XXX: (Temporary) workaround for ticket #1796: force early loading of all
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        # models from installed apps.
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        from django.db.models.loading import get_models
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        loaded_models = get_models()
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        use_plain = options.get('plain', False)
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        try:
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            if use_plain:
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                # Don't bother loading IPython, because the user wants plain Python.
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                raise ImportError
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            import IPython
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            # Explicitly pass an empty list as arguments, because otherwise IPython
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            # would use sys.argv from this script.
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            shell = IPython.Shell.IPShell(argv=[])
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            shell.mainloop()
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        except ImportError:
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            import code
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            # Set up a dictionary to serve as the environment for the shell, so
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            # that tab completion works on objects that are imported at runtime.
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            # See ticket 5082.
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            imported_objects = {}
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            try: # Try activating rlcompleter, because it's handy.
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                import readline
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            except ImportError:
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                pass
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            else:
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                # We don't have to wrap the following import in a 'try', because
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                # we already know 'readline' was imported successfully.
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                import rlcompleter
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                readline.set_completer(rlcompleter.Completer(imported_objects).complete)
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                readline.parse_and_bind("tab:complete")
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            # We want to honor both $PYTHONSTARTUP and .pythonrc.py, so follow system
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            # conventions and get $PYTHONSTARTUP first then import user.
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            if not use_plain: 
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                pythonrc = os.environ.get("PYTHONSTARTUP") 
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                if pythonrc and os.path.isfile(pythonrc): 
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                    try: 
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                        execfile(pythonrc) 
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                    except NameError: 
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                        pass
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                # This will import .pythonrc.py as a side-effect
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                import user
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            code.interact(local=imported_objects)