Question

我在dateutil.relativedelta() - 元组中使用time_unit命名了与age相对应的参数，以及获得相对时间的代码：

def time_delta(age):
    now = datetime.fromtimestamp(int(time.time()))
    if age.time_unit == "seconds":
        relative_time = now - relativedelta(seconds=int(age.value))
    elif age.time_unit == "minutes":
        relative_time = now - relativedelta(minutes=int(age.value))
    elif age.time_unit == "hours":
        relative_time = now - relativedelta(hours=int(age.value))
    elif age.time_unit == "days":
        relative_time = now - relativedelta(days=int(age.value))
    elif age.time_unit == "weeks":
        relative_time = now - relativedelta(weeks=int(age.value))
    elif age.time_unit == "months":
        relative_time = now - relativedelta(months=int(age.value))
    elif age.time_unit == "years":
        relative_time = now - relativedelta(years=int(age.value))

在Python 2.7中是否有任何方法可以使用以下内容：

relative_time = now - relativedelta(eval("eval('age.time_unit') +'=' +age.value"))

以上不起作用。我是否坚持使用if/elif或者我能做些什么更好的事情？

Answer 1

$('#test').trigger('click');

（代码未经过测试，但应该可以使用）

Answer 2

def time_delta(age):
    now = datetime.fromtimestamp(int(time.time()))
    if age.time_unit in ["seconds","minutes","hours","days","weeks","months","years"]:
        exec("relative_time = now - relativedelta({}=int(age.value))".format(age.time_unit))

我知道，我知道。 exec !!!伙计们，这种模式很安全。

编辑：错字。 exec，而非eval

将表达式作为命名参数名称传递

2 个答案: