Gets AWS VPC subnet info
I haven't used much boto, so I can just focus on some style comments:


Use four spaces per indentation level
Remove unused imports (boto.exception)
Try to order imports in alphabetical order
Move argument parsing and logging configuration code to separate functions
Be careful of the usage of next. What you were probably looking for is continue, but you can just remove that line to move on to the next region in the loop
--dedug and --verbose don't seem to make sense together. Have a look at ArgumentParser.add_mutually_exclusive_group.
Use a template or, at least, a multiline string to avoid writing so many print statements.