[interactive shell for click]

interactive_python_shell.py

#!/usr/bin/env python

import click


@click.group()
def main():
    """
    simple command manage tool
    """
    pass
  
  
@main.command('shell', short_help='Runs a shell in the app context.')
@click.option('--plain', is_flag=True, default=False, help="to use plain Python, not IPython")
def shell_command(plain):
    """Runs an interactive Python shell in the context of a given
    Flask application.  The application will populate the default
    namespace of this shell according to it's configuration.

    This is useful for executing small snippets of management code
    without having to manually configure the application.
    """
    def python():
        import code
        app = webapp
        banner = 'Python %s on %s\nApp: %s [%s]\nInstance: %s' % (
            sys.version,
            sys.platform,
            app.import_name,
            app.env,
            app.instance_path,
        )
        ctx = {}
        # Support the regular Python interpreter startup script if someone
        # is using it.
        startup = os.environ.get('PYTHONSTARTUP')
        if startup and os.path.isfile(startup):
            with open(startup, 'r') as f:
                eval(compile(f.read(), startup, 'exec'), ctx)

        ctx.update(app.make_shell_context())

        code.interact(banner=banner, local=ctx)

    def ipython():
        from IPython import start_ipython
        start_ipython(argv=[])

    with webapp.app_context():
        if plain:
            python()
        else:
            try:
                ipython()
            except:
                python()