import getopt
def fancyopts(args, options, state):
"""
read args, parse options, and store options in state
each option is a tuple of:
short option or ''
long option
default value
description
option types include:
boolean or none - option sets variable in state to true
string - parameter string is stored in state
list - parameter string is added to a list
integer - parameter strings is stored as int
function - call function with parameter
non-option args are returned
"""
namelist = []
shortlist = ''
argmap = {}
defmap = {}
for short, name, default, comment in options:
# convert opts to getopt format
oname = name
name = name.replace('-', '_')
argmap['-' + short] = argmap['--' + oname] = name
defmap[name] = default
# copy defaults to state
if isinstance(default, list):
state[name] = default[:]
elif callable(default):
state[name] = None
else:
state[name] = default
# does it take a parameter?
if not (default is None or default is True or default is False):
if short: short += ':'
if oname: oname += '='
if short:
shortlist += short
if name:
namelist.append(oname)
# parse arguments
opts, args = getopt.getopt(args, shortlist, namelist)
# transfer result to state
for opt, val in opts:
name = argmap[opt]
t = type(defmap[name])
if t is type(fancyopts):
state[name] = defmap[name](val)
elif t is type(1):
state[name] = int(val)
elif t is type(''):
state[name] = val
elif t is type([]):
state[name].append(val)
elif t is type(None) or t is type(False):
state[name] = True
# return unparsed args
return args