IMHO, parsing command-line options sounds a lot easier than it is. Definitely use the modules unless you have a good reason for not doing so. The author(s) of the module have probably already dealt with the forehead-slappers that might not be obvious right off the bat, and it will save you a lot of time down the road. Save your brainpower for the more important parts of your program rather than reinventing this particular wheel. Again, it's just my opinion...
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