gateway.py 文件源码

def _find_non_builtin_globals(source, codeobj):
    try:
        import ast
    except ImportError:
        return None
    try:
        import __builtin__
    except ImportError:
        import builtins as __builtin__

    vars = dict.fromkeys(codeobj.co_varnames)
    return [
        node.id for node in ast.walk(ast.parse(source))
        if isinstance(node, ast.Name) and
        node.id not in vars and
        node.id not in __builtin__.__dict__
    ]