feat: add more detailed python test code

backend/example/book.toml

@@ -46,5 +46,7 @@ expand = true
 heading-split-level = 3
 copy-js = true
 
+[output.markdown]
+
 [preprocessor.repl]
 command = "target/release/mdbook-repl"

backend/example/src/SUMMARY.md

@@ -1,3 +1,11 @@
 # Summary
 
-- [Intro](./intro.md)
+- [Intro](intro.md)
+- [Python](python/intro.md)
+  - [Get Started](python/get-started.md)
+  - [Basics](python/basics.md)
+  - [Variable and Types](python/variable-and-types.md)
+  - [Operators](python/operators.md)
+- [C]()
+- [C++]()
+- [Javascript]()

backend/example/src/intro.md

@@ -1,18 +1,15 @@
 # Mdbook REPL
 
-This is a python **realtime** playground which uses pyodide **webassembly** to run python code in the browser. So you can run python code in the browser without any server.
+This is a [mdbook](https://rust-lang.github.io/mdBook) playground which uses **webassembly** to execute code in the browser. So you can run code in the browser without any server.
 
-Below is a simple example, you can run the code and see the output.
+This is inspired by mdbook rust playground, but it is not limited to rust. Nowdays, webassembly is very powerful, so I learned it and try to make a playground for multiple languages with mdbook.
 
-**Python**
+Now only **Python** is supported, maybe I will add more languages in the future.
 
 ```python
-# This is a default python code
-import calendar
+# Python
 
-yy = 2024  # year
-mm = 2    # month
-
-# display the calendar
-print(calendar.month(yy, mm))
+print("Hello, World!")
 ```
+
+Tell me if you have any ideas or suggestions.

backend/example/src/python/basics.md

@@ -0,0 +1,35 @@
+# Basics
+
+## encode
+
+By default, Python source files are encoded in **UTF-8** and all strings are unicode strings. Of course, you can also specify different encodings for the source code files:
+
+```plaintext
+# -*- coding: cp-1252 -*-
+```
+
+The above definition allows the use of character encoding from the Windows-1252 character set in the source file, corresponding to Bulgarian, Belarusian, Macedonian, Russian, Serbian.
+
+## comments
+
+Python uses the hash character `#` to start a comment. The comment ends at the end of the line.
+
+```python
+# This is a comment
+
+print("Hello, World!")  # This is also a comment
+```
+
+## multi-line comments
+
+Python does not have a syntax for multi-line comments, but you can use triple quotes:
+
+```python
+"""
+This is a comment
+written in
+more than just one line
+"""
+
+print("Hello, World!")
+```

backend/example/src/python/get-started.md

@@ -0,0 +1,25 @@
+# Get Started
+
+## Who should read this tutorial?
+
+This tutorial is for developers who want to learn the Python programming language from scratch. Of course, this tutorial will also provide some in-depth modules to give you a better understanding of Python applications.
+
+## The first Python program
+
+For most programming languages, the first code to get started is "Hello World!", and the following code is to output "Hello World!" in Python:
+
+```python
+# Python
+
+print("Hello, World!")
+```
+
+A common Python file extension is .py.
+
+You can save the above code in a hello.py file and execute the script file with python commands.
+
+```bash
+python hello.py
+```
+
+You should see the output "Hello, World!" in the terminal or you can run the code in the browser by clicking the **Play** button below.

backend/example/src/python/intro.md

@@ -0,0 +1,13 @@
+# Python
+
+Python is a widely used high-level programming language for general-purpose programming, created by Guido van Rossum and first released in 1991.
+
+Python features a dynamic type system and automatic memory management and supports multiple programming paradigms, including object-oriented, imperative, functional programming, and procedural styles. It has a large and comprehensive standard library.
+
+You can learn some basics of Python in the following sections.
+
+```python
+# Python
+
+print("Hello, World!")
+```