Eliminate 0 in a set function in python

Eliminate 0 in a set function in python

References

Reference NO 1

http://docs.python.org/tutorial/datastructures.html

Reference NO 2

http://stackoverflow.com/questions/9056833/python-remove-set-from-set

Reference NO 3

http://www.itmaybeahack.com/book/python-2.6/html/p02/p02c06_sets.html

Reference NO 4

http://en.wikibooks.org/wiki/Python_Programming/Sets

Reference NO 5

http://www.tutorialspoint.com/python/python_tuples.htm

Reference NO 6

http://www.tutorialspoint.com/python/python_numbers.htm

Reference NO 7

http://www.pythonforbeginners.com/strings/

Reference NO 8

http://zetcode.com/lang/python/lists/