Python wrapper around libpcap packet capture and filtering library

This project is based on the a project of the same name at CORE Security. I plan to develop modest enhancements focused on documentation, Pythonization, and testing. Issues and pull requests are welcome.

• Enhance docstrings -- mostly done
• Adopt Python native data types where natural
• Begin writing a unit test suite -- in progress
• Port to Python 3 (stretch goal)