Python中的泛型/模板? [英] Generics/templates in python?
问题描述
python如何处理通用/模板类型的场景?假设我想创建一个外部文件"BinaryTree.py"，并使其处理二进制树，但是对于任何数据类型.
How does python handle generic/template type scenarios? Say I want to create an external file "BinaryTree.py" and have it handle binary trees, but for any data type.
因此，我可以将自定义对象的类型传递给它，并具有该对象的二叉树.如何在python中完成?
So I could pass it the type of a custom object and have a binary tree of that object. How is this done in python?
推荐答案
Python使用鸭子输入，因此它不会不需要特殊的语法来处理多种类型.
Python uses duck typing, so it doesn't need special syntax to handle multiple types.
如果您来自C ++背景，您会记住，只要在模板函数/类中使用的操作是在某种类型的T上定义的(在语法级别)，就可以使用该类型模板中的T.
If you're from a C++ background, you'll remember that, as long as the operations used in the template function/class are defined on some type T (at the syntax level), you can use that type T in the template.
因此，基本上，它的工作方式相同:
So, basically, it works the same way:
- 为要在二叉树中插入的项目类型定义合同.
- 记录此合同(即在类文档中)
- 仅使用合同中指定的操作来实现二叉树
- 享受
但是，您会注意到，除非编写显式类型检查(通常不建议这样做)，否则您将无法强制二叉树仅包含所选类型的元素.
You'll note however, that unless you write explicit type checking (which is usually discouraged), you won't be able to enforce that a binary tree contains only elements of the chosen type.
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