7.12. global 语句 7.12. global 语句 global_stmt ::= "global" identifier ( "," identifier )* global 语句是作用于整个当前代码块的声明。 它意味着所列出的标识符将被解读为全局变量。 要给全局变量赋值不可能不用到 global 关...
其他 其他 Nuts and bolts 其他 This chapter addresses a few practical issues. 这一章解决了一些实际问题。 Statement delimiters 语句分隔符 Some languages require some kind of punctuation, often a...
继承 继承 Inheritance 继承 Our classification of objects in everyday life is naturally hierarchical. 我们在日常生活中对物品的分类是自然分层的。 We know that all cats are mammals, and all mammals are ...