This is a basic matplotlib tutorial created for folks new to python and this powerful visualization library.
Comprehensive Matplotlib info - http://matplotlib.org/contents.html
Other Libraries -
- ggplot (http://ggplot.yhathq.com/)
- seaborn (https://stanford.edu/~mwaskom/software/seaborn/)
Where to find help -
- Explore the matplotlib gallery/documentation
- Google, more precisely stack overflow
Interesting articles about plotting (not necessarily for python) -