utils.py 文件源码

def get_invalid_tokens():
    """
    Get a list of invalid tokens that can be used inside sfc_model equations.

    :return: list
    """
    internal = ['self', 'None']
    kw = keyword.kwlist
    if is_python_3:
        built = dir(builtins)
    else:  # pragma: no cover
        built = dir(__builtin__)
    out = internal + kw + built
    # Need to add back in some semi-mathematical operations
    good_tokens = ('float', 'max', 'min', 'sum', 'pow', 'abs', 'round', 'pow')
    out = (x for x in out if x not in good_tokens)
    return list(out)