scratch3-analyzer 1.0.2

A comprehensive Python library to extract, analyze, and export detailed statistics from Scratch 3.0 (.sb3) project files.

A comprehensive Python library to extract, analyze, and export detailed statistics from Scratch 3.0 (.sb3) project files.

Features

• Extract and analyze Scratch 3.0 project files (.sb3)

• Analyze sprites, blocks, variables, lists, costumes, sounds, and events

• Calculate project complexity scores

• Export analysis results to Excel with multiple sheets

• Batch process multiple .sb3 files

• Command-line interface for easy use

• Python API for programmatic access

Installation

Install from PyPI:

pip install scratch3_analyzer

Requirements

• Python 3.7 or higher

• pandas >= 1.3.0

• openpyxl >= 3.0.0

Quick Start

Using Python API

from scratch3_analyzer import Scratch3Analyzer

# Create analyzer instance
analyzer = Scratch3Analyzer()

# Analyze a single .sb3 file
result = analyzer.analyze_file(
    sb3_path="my_project.sb3",
    output_excel="analysis_results.xlsx"  # Optional: export to Excel
)

# Print some statistics
print(f"Total blocks: {result['complexity']['total_blocks']}")
print(f"Total sprites: {result['complexity']['total_sprites']}")
print(f"Complexity score: {result['complexity']['complexity_score']}")

Using Command Line

# Analyze a single file
scratch3-analyzer analyze my_project.sb3 --output results.xlsx

# Analyze all files in a directory
scratch3-analyzer batch ./projects --output summary.xlsx

# Show version
scratch3-analyzer --version

# Show help
scratch3-analyzer --help

Analysis Output

The analyzer provides detailed information in these categories:

Category	Description
Project Info	Scratch version, extensions, cloud variables
Sprites	All sprites with properties (position, size, visibility, etc.)
Blocks	Block usage statistics by category and type
Variables	All variables with values and cloud variable status
Lists	All lists with item counts
Costumes	Costume details and formats
Sounds	Sound file details
Events	Event block usage statistics
Complexity	Project complexity metrics and scores

Advanced Usage

Batch Processing

from scratch3_analyzer import Scratch3Analyzer

analyzer = Scratch3Analyzer()

# Analyze all .sb3 files in a directory
results = analyzer.analyze_directory(
    directory="./projects",
    output_excel="batch_analysis.xlsx"  # Optional: export summary to Excel
)

print(f"Analyzed {len(results)} projects")

Using Individual Components

from scratch3_analyzer import SB3Extractor, ProjectAnalyzer, ExcelExporter

# Use individual components
extractor = SB3Extractor()
analyzer = ProjectAnalyzer()
exporter = ExcelExporter()

# Extract project data
project_data = extractor.extract_sb3("project.sb3")

# Analyze the data
analysis_results = analyzer.analyze_project(project_data)

# Export to Excel
exporter.export_to_excel(analysis_results, "detailed_analysis.xlsx")

Extract Specific Resources

from scratch3_analyzer import SB3Extractor

extractor = SB3Extractor()

# Extract a specific costume or sound file
costume_data = extractor.extract_specific_resource(
    sb3_path="project.sb3",
    resource_name="e0f5cf8c57f04f2e7c4a6e8d5c7b9a1f.png",
    output_path="costume.png"
)

API Reference

Scratch3Analyzer

class Scratch3Analyzer:
    def __init__(self):
        """Initialize the analyzer with extractor, analyzer, and exporter."""

    def analyze_file(self, sb3_path: str, output_excel: str = None) -> Dict[str, Any]:
        """
        Analyze a single .sb3 file.

        Args:
            sb3_path: Path to the .sb3 file
            output_excel: Optional path to export Excel results

        Returns:
            Dictionary containing all analysis results
        """

    def analyze_directory(self, directory: str, output_excel: str = None) -> List[Dict[str, Any]]:
        """
        Analyze all .sb3 files in a directory.

        Args:
            directory: Path to directory containing .sb3 files
            output_excel: Optional path to export Excel results

        Returns:
            List of analysis results for each file
        """

SB3Extractor

class SB3Extractor:
    def extract_sb3(self, sb3_path: str) -> Optional[Dict[str, Any]]:
        """
        Extract project data from .sb3 file.

        Args:
            sb3_path: Path to the .sb3 file

        Returns:
            Dictionary containing project data and resources
        """

    def extract_specific_resource(self, sb3_path: str, resource_name: str,
                                 output_path: str = None) -> Optional[bytes]:
        """
        Extract specific resource file from .sb3 file.

        Args:
            sb3_path: Path to the .sb3 file
            resource_name: Name of the resource file to extract
            output_path: Optional path to save the extracted file

        Returns:
            Binary data of the resource file
        """

ProjectAnalyzer

class ProjectAnalyzer:
    def analyze_project(self, project_data: Dict[str, Any]) -> Dict[str, Any]:
        """
        Analyze project data and generate statistics.

        Args:
            project_data: Dictionary containing project data

        Returns:
            Dictionary containing analysis results
        """

ExcelExporter

class ExcelExporter:
    def export_to_excel(self, analysis_results: Dict[str, Any], output_path: str):
        """
        Export single project analysis to Excel.

        Args:
            analysis_results: Analysis results dictionary
            output_path: Path to save Excel file
        """

    def export_multiple_to_excel(self, all_results: List[Dict[str, Any]], output_path: str):
        """
        Export multiple project analyses to Excel.

        Args:
            all_results: List of analysis results dictionaries
            output_path: Path to save Excel file
        """

Command Line Interface

Available Commands

Analyze a Single File

scratch3-analyzer analyze <sb3_file> [options]

Options:
    -o, --output OUTPUT    Output Excel file path
    --no-excel             Don't export to Excel

Analyze Multiple Files

scratch3-analyzer batch <directory> [options]

Options:
    -o, --output OUTPUT    Output Excel file path
    -r, --recursive        Recursively search for .sb3 files

Show Version

scratch3-analyzer --version

Show Help

scratch3-analyzer --help

Development

Setting Up Development Environment

# Clone the repository
git clone https://github.com/jzm3/scratch3_analyzer.git
cd scratch3_analyzer

# Create virtual environment
python -m venv venv

# On Windows:
venv\Scripts\activate
# On Linux/Mac:
source venv/bin/activate

# Install in development mode
pip install -e .

Running Tests

# Install test dependencies
pip install pytest pytest-cov

# Run tests
pytest

# Run tests with coverage
pytest --cov=scratch3_analyzer

Code Style

# Install formatting tools
pip install black flake8

# Format code
black .

# Check code style
flake8

Building and Publishing

# Build package
python -m build

# Upload to PyPI
python -m twine upload dist/*

Contributing

Contributions are welcome! Please follow these steps:

1. Fork the repository

2. Create a feature branch: git checkout -b feature/amazing-feature

3. Commit your changes: git commit -m 'Add amazing feature'

4. Push to the branch: git push origin feature/amazing-feature

5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Author

jzm ([e-mail])

Project Home

• GitHub: https://github.com/jzm3/scratch3_analyzer

• PyPI: https://pypi.org/project/scratch3_analyzer/

• Issues: https://github.com/jzm3/scratch3_analyzer/issues

Support

If you encounter any issues or have questions:

1. Check the GitHub Issues

2. Email: [e-mail]

3. Create a new issue on GitHub

Changelog

Version 1.0.1 (2024-01-08)

Added

• Added comprehensive documentation

• Improved README with detailed examples

• Enhanced API documentation

Changed

• Updated README format to reStructuredText (RST)

• Enhanced command-line help messages

Fixed

• Fixed documentation formatting

• Improved compatibility with different Python versions

Version 1.0.0 (2024-01-07)

Added

• Initial release of Scratch3 Analyzer

• Core functionality for analyzing Scratch 3.0 (.sb3) files

• Support for extracting sprites, blocks, variables, lists, costumes, sounds, and events

• Excel export functionality with multiple sheets

• Command-line interface

• Batch processing of multiple .sb3 files

• Project complexity scoring system