Need some explanation in python arrays

Need some explanation in python arrays

References

Reference NO 1

http://www.sthurlow.com/python/lesson06/

Reference NO 2

http://www.khanacademy.org/science/computer-science/v/python-lists

Reference NO 3

http://www.secnetix.de/olli/Python/list_comprehensions.hawk

Reference NO 4

http://stackoverflow.com/questions/15137367/need-some-explanation-regarding-python-activities

Reference NO 5

http://www.laurentluce.com/posts/python-list-implementation/

Reference NO 6

http://effbot.org/pyfaq/why-does-python-use-methods-for-some-functionality-e-g-list-index-but-functions-for-other-e-g-len-list.htm

Reference NO 7

http://docs.python.org/2/glossary.html

Reference NO 8

http://anh.cs.luc.edu/python/hands-on/handsonHtml/handson.html