tasks.py 文件源码

def context_env_update(context_list, env):
    es = ExitStack()
    for item in context_list:
        # create context manager and enter
        tmp_name = '__pw_cm'
        cm_code = compile(ast.Expression(item.context_expr), '<context_eval>', 'eval')
        env[tmp_name] = es.enter_context(eval(cm_code, env))

        # assign to its optional_vars in separte dict
        if item.optional_vars:
            code = assign_from_ast(item.optional_vars, tmp_name)
            exec(code, env)

    return es