The program should retrieve and display current weather conditions, using a supplied IP address to look up the location data. If no address is provided, use the user's public IP address. It should have a CLI, with any flags and parameters deemed appropriate. It should be a tool that others can easily use and modify.

The program should be written in Python, and should run on Python 2.7.3. You may use third party libraries from PyPI, but if so you must include a requirements.txt file.

pip install -r requirements.txt

python weather.py
Today it's 63° ☀ and sky is clear

python weather.py -ip 17.0.0.0