safeeval.py 文件源码

def _get_opcodes(codeobj):
    """_get_opcodes(codeobj) -> [opcodes]

    Extract the actual opcodes as a list from a code object

    >>> c = compile("[1 + 2, (1,2)]", "", "eval")
    >>> _get_opcodes(c)
    [100, 100, 103, 83]
    """
    import dis
    i = 0
    opcodes = []
    s = codeobj.co_code
    while i < len(s):
        code = ord(s[i])
        opcodes.append(code)
        if code >= dis.HAVE_ARGUMENT:
            i += 3
        else:
            i += 1
    return opcodes