splurge-dsv 2025.2.1

A utility library for working with DSV (Delimited String Values) files

splurge-dsv

A robust Python library for parsing and processing delimited-separated value (DSV) files with advanced features for data validation, streaming, and error handling.

Features

• Multi-format DSV Support: Parse CSV, TSV, pipe-delimited, and custom delimiter files
• Memory-Efficient Streaming: Process large files without loading entire content into memory
• Security & Validation: Comprehensive path validation and file permission checks
• Unicode Support: Full Unicode character and encoding support
• Type Safety: Full type annotations with mypy validation
• Comprehensive Testing: 420 tests (409 passed, 11 skipped) with 94% code coverage including property-based testing, edge case testing, and cross-platform compatibility

⚠️ BREAKING CHANGES in v2025.2.0

• Exception Names Changed: All exceptions now use SplurgeDsv* prefix (e.g., SplurgeParameterError → SplurgeDsvParameterError)
• Resource Manager Removed: The ResourceManager module and all related classes have been completely removed

See the CHANGELOG for migration guidance.

Installation

pip install splurge-dsv

Quick Start

CLI Usage

# Parse a CSV file
python -m splurge_dsv data.csv --delimiter ,

# Stream a large file
python -m splurge_dsv large_file.csv --delimiter , --stream --chunk-size 1000

API Usage

from splurge_dsv import DsvHelper

# Parse a CSV string
data = DsvHelper.parse("a,b,c", delimiter=",")
print(data)  # ['a', 'b', 'c']

# Parse a CSV file
rows = DsvHelper.parse_file("data.csv", delimiter=",")

Modern API

from splurge_dsv import Dsv, DsvConfig

# Create configuration and parser
config = DsvConfig.csv(skip_header=1)
dsv = Dsv(config)

# Parse files
rows = dsv.parse_file("data.csv")

Documentation

• Detailed Documentation: Complete API reference, CLI options, and examples
• Testing Best Practices: Comprehensive testing guidelines and patterns
• Hypothesis Usage Patterns: Property-based testing guide
• Changelog: Release notes and migration guides

License

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

This library enforces deterministic newline handling for text files. The reader normalizes CRLF (\r\n), CR (\r) and LF (\n) to LF internally and returns logical lines. The writer utilities normalize any input newlines to LF before writing. This avoids platform-dependent differences when reading files produced by diverse sources.

Recommended usage:

• When creating files inside the project, prefer the open_text_writer context manager or SafeTextFileWriter which will normalize to LF.
• When reading unknown files, the open_text / SafeTextFileReader will provide deterministic normalization regardless of the source.
• SplurgeResourceAcquisitionError - Resource acquisition failures
• SplurgeResourceReleaseError - Resource cleanup failures

Development

Testing Suite

splurge-dsv features a comprehensive testing suite designed for robustness and reliability:

Test Categories

• Unit Tests: Core functionality testing (300+ tests)
• Integration Tests: End-to-end workflow validation (50+ tests)
• Property-Based Tests: Hypothesis-driven testing for edge cases (50+ tests)
• Edge Case Tests: Malformed input, encoding issues, filesystem anomalies
• Cross-Platform Tests: Path handling, line endings, encoding consistency

Running Tests

# Run all tests
pytest tests/ -v

# Run with coverage report
pytest tests/ --cov=splurge_dsv --cov-report=html

# Run specific test categories
pytest tests/unit/ -v                    # Unit tests only
pytest tests/integration/ -v            # Integration tests only
pytest tests/property/ -v               # Property-based tests only
pytest tests/platform/ -v               # Cross-platform tests only

# Run with parallel execution
pytest tests/ -n 4 --cov=splurge_dsv

# Run performance benchmarks
pytest tests/ --durations=10

Test Quality Standards

• 94%+ Code Coverage: All public APIs and critical paths covered
• Property-Based Testing: Hypothesis framework validates complex scenarios
• Cross-Platform Compatibility: Tests run on Windows, Linux, and macOS
• Performance Regression Detection: Automated benchmarks prevent slowdowns
• Zero False Positives: All property tests pass without spurious failures

Testing Best Practices

• Tests use pytest-mock for modern mocking patterns
• Property tests use Hypothesis strategies for comprehensive input generation
• Edge case tests validate error handling and boundary conditions
• Cross-platform tests ensure consistent behavior across operating systems

Code Quality

The project follows strict coding standards:

• PEP 8 compliance
• Type annotations for all functions
• Google-style docstrings
• 85%+ coverage gate enforced via CI
• Comprehensive error handling

Changelog

See the CHANGELOG for full release notes.

License

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

More Documentation

• Detailed docs: docs/README-details.md
• E2E testing coverage: docs/e2e_testing_coverage.md

Contributing

Contributions are welcome! Please see our Contributing Guide for detailed information on:

• Development setup and workflow
• Coding standards and best practices
• Testing requirements and guidelines
• Pull request process and review criteria

For major changes, please open an issue first to discuss what you would like to change.

Support

For support, please open an issue on the GitHub repository or contact the maintainers.