Many people are saying "Data Scientist might be the sexist job of the 21 century." But, what is data science? How can I do it? Fortunately, there're many open source tool can help us to do those data science things. I'll mainly focus on Python in the speech. I'll give some examples about what data scientists are doing. Also, I'll give a short introduction for some python libraries which can help us to mining the data, including numpy, pandas, scikit-learn, matplotlib, and statsmodel. Will have a demo if time permitted.