def _importers():
    # import things we need
    # but make this done on a first use basis

    global _IMPORTS
    if _IMPORTS:
        return

    _IMPORTS = True

    global _HAS_BS4, _HAS_LXML, _HAS_HTML5LIB

    try:
        import bs4  # noqa
        _HAS_BS4 = True
    except ImportError:
        pass

    try:
        import lxml  # noqa
        _HAS_LXML = True
    except ImportError:
        pass

    try:
        import html5lib  # noqa
        _HAS_HTML5LIB = True
    except __HOLE__:
        pass


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dataset/ETHPy150Open pydata/pandas/pandas/io/html.py/_importers