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用于重复标记的宏

编写模板函数以避免复制粘贴

用于重复标记的宏 是 CoddyKit 上的免费 Flask Academy 课时。这是第 4 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Flask Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Flask Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Repeated Markup Begs for a Function

When the same input field or card markup appears with small tweaks, copying it gets messy. A macro turns that pattern into a reusable function. 🛠️

What a Macro Is

A macro is a template function: you define markup once with parameters, then call it many times with different arguments.

Define a Macro

You declare a macro with a name and parameters, write its markup, and close it with endmacro. It is reusable from then on.

{% macro field(name) %}
  <input name="{{ name }}">
{% endmacro %}

Call a Macro

Invoke a macro like a function, passing arguments. Jinja2 renders the macro body with those values right where you call it.

{{ field("email") }}

Parameters Customize Output

Macro parameters let one definition produce many variations, such as different input types or labels, from a single source of markup.

{% macro field(name, type="text") %}
  <input name="{{ name }}" type="{{ type }}">
{% endmacro %}

Default Argument Values

Give parameters defaults so common calls stay short. Callers override a default only when they need something different.

{{ field("age", type="number") }}

Keep Macros in Their Own File

Store shared macros in a file like forms.html so many templates can import and reuse the same helpers.

{% import "forms.html" as forms %}

Import Then Call

After import, call a macro through its namespace. This keeps your macro library separate from the page using it.

{{ forms.field("email") }}

Import Specific Macros

Use from import to pull just the macros you need by name, keeping the template clean and the intent obvious.

{% from "forms.html" import field %}

Macros vs Includes

An include drops fixed markup; a macro takes arguments and varies its output. Reach for macros when the snippet must change per call.

DRY Templates at Last

Macros remove copy-paste from your templates: fix the field markup once and every call site updates. That is templating done right. ✨

Quick Check

What makes a macro different from an include?

Recap: Macros

A macro is a reusable, parameterized template function. Define it once, import it, and call it anywhere to keep templates DRY. 🎯

常见问题解答

「用于重复标记的宏」课时是免费的吗？

是的 — 「用于重复标记的宏」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Flask Academy 课程的其余内容，请升级到 CoddyKit PRO。 Flask Academy 课程共包含 4 节课。

「用于重复标记的宏」这节课中我会学到什么？

编写模板函数以避免复制粘贴你通过在浏览器中直接运行的动手代码来练习 Flask Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Flask Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Flask Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 4 节课，共 4 节。

「用于重复标记的宏」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Flask Academy 课中编写并运行代码吗？

能。每节 Flask Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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