Installing Packages with pip

# pip commands (run in terminal, not Python!)
# pip install package_name        # install
# pip install package==1.0        # specific version
# pip install package>=1.0        # minimum version
# pip install -U package           # upgrade
# pip uninstall package            # remove
# pip list                        # list installed
# pip show package                # package details
# pip freeze                      # exact versions
# pip freeze > requirements.txt   # export deps

# Popular packages to know:
popular = {
    "requests": "HTTP library — API calls",
    "flask": "Lightweight web framework",
    "numpy": "Scientific computing",
    "pandas": "Data analysis",
    "pytest": "Testing framework",
    "beautifulsoup4": "Web scraping",
    "pillow": "Image processing",
    "click": "CLI framework",
    "python-dotenv": "Environment variables",
    "black": "Code formatter",
}

print("=== Popular Python Packages ===")
for name, desc in popular.items():
    print(f"  pip install {name:20s} # {desc}")

# Install from requirements.txt:
# pip install -r requirements.txt