def __init__(self) :

self.fileliststr = ''

self.linenumberstr = ''

self.excludestr = ''

self.catstr = ''

self.filearg = '-f'

self.numberarg = '-n'

self.exclarg = '-exclude'

self.catarg = '-category'

self.arglist = [self.filearg, self.numberarg, self.exclarg, self.catarg]

def check(self, args) :

# find filestring

argval = self._get_arg(args, self.filearg)

if argval == -1 :

return argval

self.fileliststr = argval

# find numberstring

argval = self._get_arg(args, self.numberarg)

if argval == -1 :

return argval

self.linenumberstr = argval

# find exclude name

argval = self._get_arg(args, self.exclarg)

if argval == -1 :

return argval

self.excludestr = argval

# find category name

argval = self._get_arg(args, self.catarg)

if argval == -1:

return argval

self.catstr = argval

return 0

def _get_arg(self, args, argname) :

if not argname in args :

print 'given arguments do not contain files argument {0}. Please supply it'.format(argname)

return -1

ix = operator.indexOf(args, argname)

if args[ix+1] in self.arglist :

print 'invalid argument value given for argument {0}'.format(argname)

return -1