utils.py 文件源码

def can_use_widgets():
    """ Expanded from from http://stackoverflow.com/a/34092072/1958900
    """
    if 'IPython' not in sys.modules:
        # IPython hasn't been imported, definitely not
        return False
    from IPython import get_ipython

    # check for `kernel` attribute on the IPython instance
    if getattr(get_ipython(), 'kernel', None) is None:
        return False

    try:
        import ipywidgets as ipy
        import traitlets
    except ImportError:
        return False

    return True