ipython and optparse

gistfile1.txt

In [1]: from optparse import OptionParser

In [2]: parser = OptionParser()

In [3]: parser.add_option("", "--cpu-state")
Out[3]: <Option at 0x1556fc8: --cpu-state>

In [4]: args = ["--stuff", "--cpu-state"]

In [5]: options, args = parser.parse_args(args)
Usage: ipython2 [options]

ipython2: error: no such option: --stuff
An exception has occurred, use %tb to see the full traceback.

SystemExit: 2

To exit: use 'exit', 'quit', or Ctrl-D.