Mojo Academy · 课时

读取 Python 返回的对象

解包 Python 返回的结果

读取 Python 返回的对象 是 CoddyKit 上的免费 Mojo Academy 课时。这是第 3 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 Mojo Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Mojo 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。

Results Come Back

When a Python function returns, you get a value back in Mojo. Knowing how to unpack it lets you use the result in your code. 📦

Always a PythonObject

Every Python call returns a PythonObject, Mojo's wrapper around whatever Python produced, be it a number, string, or array.

var total = np.sum(a)

Convert to Int

To use a result as a native Mojo number, convert it. Wrapping it with Int turns a Python integer into a Mojo Int.

var count = Int(py_len)

Convert to Float

For decimal results, use Float64 to pull a Python float into a Mojo floating-point value you can compute with.

var mean = Float64(py_mean)

Read Attributes

You can keep using dot access on a returned object to read its attributes, exactly as you would in Python itself.

var size = arr.size

Index Into Results

If the result is a sequence, index it with brackets. Each element is itself a PythonObject you can convert next.

var first = a[0]

Call Methods Back

Returned objects keep their Python methods. Call them with dot syntax to transform results further before reading them.

var flat = arr.flatten()

Convert to Mojo String

To turn a Python text result into native Mojo text, wrap it with String so you can store and join it normally.

var label = String(py_text)

Convert Early

Once you need real Mojo computation, convert the result out of PythonObject. Staying wrapped keeps you slow inside the Python world.

Check for Truth

Python results can be tested in conditions too. Convert with Bool when you need a yes-or-no answer from a returned object.

if Bool(py_flag):
    print("ready")

Why It Matters

Reading results back lets you blend Python output with fast Mojo logic, getting answers out of libraries and into your kernels. ⚡

Quick Check

Recall how you turn a Python integer result into a usable Mojo number.

Recap

You learned every Python call returns a PythonObject, and how to convert it with Int, Float64, or String to use the result in Mojo. 🎯

常见问题解答

「读取 Python 返回的对象」课时是免费的吗？

是的 — 「读取 Python 返回的对象」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 Mojo Academy 课程的其余内容，请升级到 CoddyKit PRO。 Mojo Academy 课程共包含 4 节课。

「读取 Python 返回的对象」这节课中我会学到什么？

解包 Python 返回的结果你通过在浏览器中直接运行的动手代码来练习 Mojo 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 Mojo Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Mojo 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 3 节课，共 4 节。

「读取 Python 返回的对象」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 Mojo Academy 课中编写并运行代码吗？

能。每节 Mojo 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。

此课程中的所有课时

← 返回 Mojo Academy