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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def exists(path):
    '''
    Check if the directory is configured in the SYSTEM path
    Case-insensitive and ignores trailing backslash

    Returns:
        boolean True if path exists, False if not

    CLI Example:

    .. code-block:: bash

        salt '*' win_path.exists 'c:\\python27'
        salt '*' win_path.exists 'c:\\python27\\'
        salt '*' win_path.exists 'C:\\pyThon27'
    '''
    path = _normalize_dir(path)
    sysPath = get_path()

    return path.lower() in (x.lower() for x in sysPath)