python - 获取给定结构的所有对象及其全局名称

Question

假设我有以下对象:

gray       =    (132, 132, 132)
green      =    (0, 104, 0)
red        =    (168, 0, 68)

如何获取所有这种形式(RGB)的globals()以及对应对象的名称？

Answer 1

使用 isinstance ，您可以检查对象的类型。并使用 vars ，您将获得变量名称到值的映射。

gray = (132, 132, 132)
green = (0, 104, 0)
red = (168, 0, 68)
somethingelse = 0

for key, value in vars().items():
    is_rgb = (
        isinstance(value, tuple) and
        len(value) == 3 and
        all(isinstance(x, int) for x in value)
    )
    if is_rgb:
        print(key)

---

另一种方式:try-except

gray = (132, 132, 132)
green = (0, 104, 0)
red = (168, 0, 68)
somethingelse = 0

for key, value in vars().items():
    try:
        _, _, _ = value
        if isinstance(value, tuple):
            print(key)
    except (TypeError, ValueError):
        pass