@classmethod
def _get_default(cls):
    '\n        Get default value of the config.\n\n        Returns\n        -------\n        str\n        '
    if IsDebug.get():
        return 'Python'
    try:
        import ray
    except ImportError:
        pass
    else:
        if (version.parse(ray.__version__) < version.parse('1.4.0')):
            raise ImportError('Please `pip install modin[ray]` to install compatible Ray version.')
        return 'Ray'
    try:
        import dask
        import distributed
    except ImportError:
        pass
    else:
        if ((version.parse(dask.__version__) < version.parse('2.22.0')) or (version.parse(distributed.__version__) < version.parse('2.22.0'))):
            raise ImportError('Please `pip install modin[dask]` to install compatible Dask version.')
        return 'Dask'
    try:
        import omniscidbe
    except ImportError:
        try:
            import dbe
        except ImportError:
            pass
        else:
            return 'Native'
    else:
        return 'Native'
    raise ImportError('Please refer to installation documentation page to install an engine')
Get default value of the config.

Returns
-------
str
@classmethod
def _get_default(cls):
    '\n        Get default value of the config.\n\n        Returns\n        -------\n        str\n        '
    if IsDebug.get():
        return 'Python'
    try:
        import ray
    except ImportError:
        pass
    else:
        if (version.parse(ray.__version__) < version.parse('1.4.0')):
            raise ImportError('Please `pip install modin[ray]` to install compatible Ray version.')
        return 'Ray'
    try:
        import dask
        import distributed
    except ImportError:
        pass
    else:
        if ((version.parse(dask.__version__) < version.parse('2.22.0')) or (version.parse(distributed.__version__) < version.parse('2.22.0'))):
            raise ImportError('Please `pip install modin[dask]` to install compatible Dask version.')
        return 'Dask'
    try:
        import omniscidbe
    except ImportError:
        try:
            import dbe
        except ImportError:
            pass
        else:
            return 'Native'
    else:
        return 'Native'
    raise ImportError('Please refer to installation documentation page to install an engine')