How do I write a function for this this in Python? [closed]

How do I write a function for this this in Python? [closed]

References

Reference NO 1

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

Reference NO 2

http://anh.cs.luc.edu/python/hands-on/3.1/handsonHtml/functions.html

Reference NO 3

http://stackoverflow.com/questions/4939922/write-a-function-for-python

Reference NO 4

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

Reference NO 5

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

Reference NO 6

http://www.diveintopython.net/file_handling/file_objects.html

Reference NO 7

http://docs.python-guide.org/en/latest/writing/style.html

Reference NO 8

http://www.artima.com/weblogs/viewpost.jsp?thread=4829