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设置虚拟环境并安装 Flask

创建隔离环境并使用 pip 安装 Flask

设置虚拟环境并安装 Flask 是 CoddyKit 上的免费 Flask Academy 课时。这是第 2 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。

Why Isolate Projects

Each project wants its own package versions. A virtual environment keeps Flask and friends separate from your system Python.

Meet venv

Python ships venv, a built-in tool that creates a private folder holding a fresh, isolated copy of pip and packages.

Create the Environment

Run the venv module and pick a folder name like .venv. This builds your isolated environment in seconds. ✨

python -m venv .venv

Activate on macOS and Linux

Activating points your shell at the env. On macOS or Linux you source the activate script inside the env folder.

source .venv/bin/activate

Activate on Windows

On Windows the activation script lives under Scripts. Run it and your prompt shows the env name, confirming it is on.

.venv\Scripts\activate

Confirm It Worked

When active, your prompt is prefixed with the env name. Now pip installs land only inside this project, not globally.

Install Flask

With the env active, install Flask using pip. It pulls Flask plus its dependencies like Werkzeug and Jinja2.

pip install Flask

Verify the Version

Check that Flask is installed and see its version. A clean version number means you are ready to write code.

python -m flask --version

Freeze Your Dependencies

pip freeze lists exact versions. Saving them lets teammates rebuild the same environment later with one command.

pip freeze > requirements.txt

Reinstall from the File

Anyone can recreate your setup from requirements.txt, so your project runs the same on every machine.

pip install -r requirements.txt

Deactivate When Done

Type deactivate to leave the environment and return to your normal shell. Reactivate any time you work on the project.

deactivate

Quick Check

Quick check on isolating your project.

Recap

You created a venv, activated it, installed Flask with pip, and froze your deps. Your isolated workspace is ready to build. 🎉

常见问题解答

「设置虚拟环境并安装 Flask」课时是免费的吗？

是的 — 「设置虚拟环境并安装 Flask」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。

「设置虚拟环境并安装 Flask」这节课中我会学到什么？

创建隔离环境并使用 pip 安装 Flask 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 2 节课，共 4 节。

「设置虚拟环境并安装 Flask」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。

此课程中的所有课时

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