@property
    def apps(self):

        INSTALLED_APPS = []

        # optionaly enable sorl.thumbnail
        try:
            import sorl  # noqa
            INSTALLED_APPS += ['sorl.thumbnail']
        except Exception:
            pass

        # optionaly enable easy_thumbnails
        try:
            import easy_thumbnails  # noqa
            INSTALLED_APPS += ['easy_thumbnails']
        except Exception:
            pass

        # optionaly enable constance
        try:
            import constance
        except __HOLE__:
            pass
        else:
            INSTALLED_APPS += ['constance',
                               'constance.backends.database']

        return INSTALLED_APPS + [
            'feincms',
            'mptt',
            'crispy_forms',
            'floppyforms',

            'dbtemplates',
            'leonardo.module',

            'feincms.module.page',  # noqa

            'leonardo.module.web',

            'markupfield',
        ]
dataset/ETHPy150Open django-leonardo/django-leonardo/leonardo/module/web/__init__.py/Default.apps