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Google provide free class for people with a little bit of programming experience who want to learn Python. The google python class includes written materials, lecture videos, and lots of code exercises to practice Python coding. These materials are used within Google to introduce Python to people who have just a little programming experience.
Find more @ https://developers.google.com/edu/python/
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Web links for learning Python:
https://sites.google.com/site/seqomics/sequencing/info-seq/python
Books for learning python:
Python Educational Material
The python packages https://pypi.python.org/pypi/