python argparse file extension checking

python argparse file extension checking

References

Reference NO 1

http://stackoverflow.com/questions/15203829/python-argparse-file-extension-checking

Reference NO 2

http://www.velocityreviews.com/forums/t745523-argparse-and-filetypes.html

Reference NO 3

http://docs.python.org/2/howto/argparse.html

Reference NO 4

http://bugs.python.org/issue13824

Reference NO 5

http://nullege.com/codes/search/argparse.FileType

Reference NO 6

https://argparse.googlecode.com/svn/trunk/doc/argparse-vs-optparse.html

Reference NO 7

http://www.cyberciti.biz/faq/python-command-line-arguments-argv-example/

Reference NO 8

http://travelingfrontiers.wordpress.com/2010/11/03/simple-python-argparse-wrapper/