chore: import upstream snapshot with attribution

2026-07-13 12:48:47 +08:00
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+---
+layout: default
+title: "Click"
+nav_order: 6
+has_children: true
+---
+
+# Tutorial: Click
+
+> This tutorial is AI-generated! To learn more, check out [AI Codebase Knowledge Builder](https://github.com/The-Pocket/Tutorial-Codebase-Knowledge)
+
+Click<sup>[View Repo](https://github.com/pallets/click/tree/main/src/click)</sup> is a Python library that makes creating **command-line interfaces (CLIs)** *easy and fun*.
+It uses simple Python **decorators** (`@click.command`, `@click.option`, etc.) to turn your functions into CLI commands with options and arguments.
+Click handles parsing user input, generating help messages, validating data types, and managing the flow between commands, letting you focus on your application's logic.
+It also provides tools for *terminal interactions* like prompting users and showing progress bars.
+
+
+```mermaid
+flowchart TD
+    A0["Context"]
+    A1["Command / Group"]
+    A2["Parameter (Option / Argument)"]
+    A3["ParamType"]
+    A4["Decorators"]
+    A5["Term UI (Terminal User Interface)"]
+    A6["Click Exceptions"]
+    A4 -- "Creates/Configures" --> A1
+    A4 -- "Creates/Configures" --> A2
+    A0 -- "Manages execution of" --> A1
+    A0 -- "Holds parsed values for" --> A2
+    A2 -- "Uses for validation/conversion" --> A3
+    A3 -- "Raises on conversion error" --> A6
+    A1 -- "Uses for user interaction" --> A5
+    A0 -- "Handles/Raises" --> A6
+    A4 -- "Injects via @pass_context" --> A0
+```
+