Python is used by MIT in their first few programming courses
they probably wouldn't choose it if it wasn't any good
Python is used by many companies
here are some companies that use it and what they have to say about it
https://www.python.org/about/quotes/
here's a free online book for game programming with Python and Pygame
Program Arcade Games With Python And Pygame
http://programarcadegames.com/
The book was written and is used by a professor for his Introduction to Programming class.
Since it is an introduction, it assumes no experience. So it starts off at the very beginning.
here's a video of a game one of his student's made
/watch?v=S7eMdoM1MTc
https://www.youtube.com/watch?v=S7eMdoM1MTc
nothing too fancy, but pretty impressive for their first game
here's some more
https://www.youtube.com/playlist?list=PLUjR0nhln8uZZjNv16i-v5Sgi_spcoWQS
https://www.youtube.com/user/professorcraven/playlists
Here is another free online book using Python. Its a book on data structures. It's advanced so you won't be able to do it until you've finished the first book. .
http://interactivepython.org/courselib/static/pythonds/index.html
you can do all kinds of graphs and plotting with python
http://matplotlib.org/
data analysis
http://pandas.pydata.org/
more companies that use Python
https://www.python.org/about/success/