utils.py 文件源码

def _validate_identifier(name):
    try:
        mod = ast.parse('%s = 1' % name)
    except SyntaxError:
        return False
    else:
        if (isinstance(mod, ast.Module) and len(mod.body) == 1 and
                isinstance(mod.body[0], ast.Assign) and
                len(mod.body[0].targets) == 1 and
                isinstance(mod.body[0].targets[0], ast.Name)):
            return True
    return False