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Python Package Management: pip and pipreqs Commands Reference

pip - Python Package Installer

Basic Commands

Install a package:
```
pip install package_name
```
Install specific version:
```
pip install package_name==1.2.3
```
Install multiple packages:
```
pip install package1 package2
```
Install from requirements file:
```
pip install -r requirements.txt
```
Upgrade a package:
```
pip install --upgrade package_name
```
Uninstall a package:
```
pip uninstall package_name
```

Package Information

List installed packages:
```
pip list
```
Show package details:
```
pip show package_name
```
Search for packages:
```
pip search query
```
Check for outdated packages:
```
pip list --outdated
```

Requirements Files

Generate requirements file from installed packages:
```
pip freeze > requirements.txt
```

Environment Options

Install to user directory:
```
pip install --user package_name
```
Install without dependencies:
```
pip install --no-deps package_name
```

Install from alternative index:

pip install --index-url URL package_name

Install in development mode:
```
pip install -e .
```

Cache Management

Clear pip cache:
```
pip cache purge
```
Show pip cache info:
```
pip cache info
```

pipreqs - Generate Requirements Files

Pipreqs automatically generates requirements.txt files based on imports in your project.

Installation

pip install pipreqs

Basic Usage

Generate requirements.txt in current directory:
```
pipreqs .
```
Generate for specific project path:
```
pipreqs /path/to/project
```

Additional Options

Force overwrite existing requirements.txt:
```
pipreqs --force .
```
Print dependencies without creating a file:
```
pipreqs --print .
```

Use different filename:

pipreqs --savepath requirements-dev.txt .

Exclude specific directories:
```
pipreqs --ignore tests,docs .
```
Use different PyPI server:
```
pipreqs --pypi-server URL .
```
Use proxy:
```
pipreqs --proxy URL .
```
Debug mode:
```
pipreqs --debug .
```
Get help:
```
pipreqs --help
```