I also like using argparse. Nice utility library to "power up" helpful scripts.
Or do you find Python's argument parsing to be especially notable for some reason?
* sys.argv
* argparse
* optparse
* getopt
There are, of course, additional third party modules (like opster) that also handle arguments.
optparse is deprecated (kept around for obvious backward-compat reasons)
getopt is just a different API for people who feel more comfortable with C's getopt API and don't want to learn something else
argparse is the CLI option parser for the future.
tl;dr: There is one way to parse command line arguments: sys.argv. But there are a few abstractions of doing that available in the stdlib.