类型之间进行转换。 当一个 T 类型继承自 IBaseObject<T> , 表示 [...] 展类型作为参数或返回值的实际使用标记为 IExtendedObject<T> . 这

. Kids, don't try this [...] to 10: t = (1, 2 [...] ("Tuple:", t) # We can

! v = text[i] # DON'T

, don't be lazy [...] ("Ok, if you don't