Run Python in the Browser (Pyodide)

With Pyodide, you can run Python directly in the browser without any server-side setup. The runtime downloads on first use (~10MB) and all cells on the same page share variables by default.

Usage Guide

• Code is hidden by default — click "Show Code" to expand
• Click "Run" to execute the cell
• Click "Clear" to hide the output
• All cells share the same Python environment on this page

Basic Examples

Start with simple Python expressions:

Hello World

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Basic calculations

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Variable Sharing Between Cells

Define data in one cell and reuse it in subsequent cells:

Step 1: Define data

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Step 2: Statistical analysis

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Step 3: More operations

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Data Visualization

Create beautiful plots with Matplotlib:

Line plot

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Scatter plot with trend

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Bar chart

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Working with Pandas

Analyze data using the popular Pandas library:

DataFrame operations

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Advanced: Machine Learning

Try a simple machine learning example:

K-Means Clustering

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Custom Layout Options

Use the HTML form to override locale or layout per cell:

Horizontal Layout

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中文示例

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Markdown Syntax

You can use the pyodide language identifier in code blocks to create interactive cells:

```pyodide
print("Hello")
```

```pyodide title="With Title"
print("Hello")
```

You can also use the <Pyodide> component for more control:

<Pyodide title="Custom Layout" layout="horizontal">
print("Hello")
</Pyodide>

Important Notes

• First run: Downloads Pyodide runtime (~10MB); subsequent runs are instant
• Variable persistence: Variables persist within this page; navigating away resets the environment
• Package support: Most pure Python packages work; some C extensions are available
• Performance: Runs in browser with near-native speed via WebAssembly

Limitations

• Large numerical computations may be slower than native Python
• Some packages with C dependencies might not be available
• File I/O is limited to browser's virtual filesystem