A Quick Look Cursor

# Python
__pycache__/
*.py[cod]
*$py.class
*.so
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
*.egg-info/
.installed.cfg
*.egg

# Virtual Environment
venv/
env/
ENV/

# IDE
.idea/
.vscode/
*.swp
*.swo

# Testing
.coverage
.pytest_cache/
htmlcov/

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

[project]
name = "my_project"
version = "0.1.0"
authors = [
    { name = "Your Name", email = "your.email@example.com" },
]
description = "A short description of your project"
readme = "README.md"
requires-python = ">=3.8"
dependencies = []

[project.optional-dependencies]
dev = [
    "pytest>=7.0",
    "pytest-cov>=4.0",
    "black>=23.0",
    "isort>=5.0",
    "flake8>=6.0",
]

[tool.pytest.ini_options]
testpaths = ["tests"]
python_files = ["test_*.py"]

# Core dependencies
requests>=2.28.0
python-dotenv>=1.0.0

# Development dependencies
pytest>=7.0.0
black>=23.0.0
flake8>=6.0.0

"""Main application module."""
import logging
from pathlib import Path
from typing import List

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
)
logger = logging.getLogger(__name__)


def process_file(input_path: str = "demo.txt", output_path: str = "demo_no_spaces.txt") -> List[str]:
    """
    Read `input_path`, strip trailing whitespace from each line,
    remove spaces, write the processed lines to `output_path`, and return the list of processed lines.
    """
    processed: List[str] = []
    try:
        input_file = Path(input_path)
        output_file = Path(output_path)

        with input_file.open("r", encoding="utf-8") as infile, output_file.open("w", encoding="utf-8") as outfile:
            for line in infile:
                processed_line = line.rstrip().replace(" ", "")
                processed.append(processed_line)
                outfile.write(processed_line + "\n")
    except FileNotFoundError:
        logger.error("%s file not found", input_path)
    except IOError as e:
        logger.error("Error reading or writing file: %s", e)

    logger.info("Processing finished.")
    return processed


def main():
    """Main application entry point."""
    logger.info("Application starting...")
    print("Hello, World!")
    # Process demo.txt into demo_no_spaces.txt
    process_file()
    logger.info("Application finished.")


if __name__ == "__main__":
    main()

# Initialize git (if not already initialized)
git init
git add .
git commit -m "Initial project structure"

# Create a virtual environment and activate it
python3 -m venv venv
# macOS / Linux:
source venv/bin/activate
# Windows (PowerShell):
# venv\Scripts\Activate.ps1
# Windows (cmd.exe):
# Install runtime dependencies
pip install -r requirements.txt

# Run the application (be sure to use the correct path to the main module)
python src/my_project/main.py

"""Test suite for main module."""
from pathlib import Path
from my_project.main import process_file


def test_process_file_creates_output_and_returns_processed_lines(tmp_path: Path):
    # Prepare test input file in temporary directory
    input_file = tmp_path / "demo.txt"
    output_file = tmp_path / "demo_no_spaces.txt"

    content = "hello world\nfoo  bar\n"
    input_file.write_text(content, encoding="utf-8")

    # Call the function with explicit paths
    processed = process_file(str(input_file), str(output_file))

    # Expected: spaces removed per line (rstrip already applied in function)
    expected = ["helloworld", "foobar"]
    assert isinstance(processed, list)
    assert processed == expected

    # Check file content
    written = output_file.read_text(encoding="utf-8").splitlines()
    assert written == expected

pip install -e .

touch src/my_project/__init__.py

pytest ./tests