python-cmd2: flagReader.py annotate

annotate flagReader.py @ 79:f583663c610f

switch to pyparsing worked

author	catherine@Elli.myhome.westell.com
date	Fri, 04 Jul 2008 07:08:21 -0400
parents	47af95ad83c7
children

rev	line source
0 febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	1 """Defines and parses UNIX-style flags to modify command arguments.
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	2
9 f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	3 Use of flagReader is DEPRECATED in favor of optparse from the
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	4 Python standard library. For backwards compatibility, flagReader
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	5 has been re-implemented as a wrapper around optparse.
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	6
0 febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	7 print flagReader.FlagSet.parse.__doc__ for usage examples.
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	8 """
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	9
10 47af95ad83c7 working the refactor still catherine@localhost parents: 9 diff changeset	10 import re, optparse, warnings
47af95ad83c7 working the refactor still catherine@localhost parents: 9 diff changeset	11 warnings.warn("""flagReader has been deprecated. Use optparse instead.""", DeprecationWarning)
0 febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	12
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	13 class Flag(object):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	14 def __init__(self, name, abbrev=None, nargs=0):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	15 """Flag(name, abbrev=None, nargs=0) : Defines a flag.
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	16
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	17 name: the full name of the flag (double-dash form)
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	18 abbrev: the single-letter abbreviated form of the flag; defaults to
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	19 nargs: number of arguments expected after the flag"""
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	20
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	21 self.name = name
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	22 self.abbrev = abbrev or name[0]
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	23 self.fullabbrev = '-%s' % (self.abbrev)
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	24 self.fullname = '--%s' % (name)
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	25 self.nargs = nargs
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	26
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	27 class FlagSet(object):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	28 def __init__(self, flags):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	29 if not issubclass(type(flags), list):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	30 raise TypeError, 'Argument must be a list'
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	31 self.flags = flags
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	32 self.lookup = {}
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	33 for flag in self.flags:
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	34 self.lookup[flag.abbrev] = flag
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	35 self.lookup[flag.fullabbrev] = flag
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	36 self.lookup[flag.fullname] = flag
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	37 self.abbrevPattern = re.compile('^-([%s]+)$' % (''.join(f.abbrev for f in flags)))
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	38 def parse(self, arg):
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	39 """
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	40 Finds flags; returns {flag: (values, if any)} and the remaining argument.
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	41
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	42 >>> f = FlagSet([Flag('foo'), Flag('bar'), Flag('gimmea', nargs=1)])
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	43 >>> f.parse('-fb')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	44 ({'foo': [], 'bar': []}, '')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	45 >>> f.parse('no flags')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	46 ({}, 'no flags')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	47 >>> f.parse('-f blah')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	48 ({'foo': []}, 'blah')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	49 >>> f.parse('--bar')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	50 ({'bar': []}, '')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	51 >>> f.parse('--bar -f')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	52 ({'foo': [], 'bar': []}, '')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	53 >>> f.parse('--notaflag')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	54 ({}, '--notaflag')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	55 >>> f.parse('')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	56 ({}, '')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	57 >>> f.parse('--gimmea bee -f and then some other stuff')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	58 ({'gimmea': ['bee'], 'foo': []}, 'and then some other stuff')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	59 >>> f.parse('hidden -bar')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	60 ({}, 'hidden -bar')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	61 >>> f.parse('-g myarg -b')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	62 ({'gimmea': ['myarg'], 'bar': []}, '')
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	63 """
9 f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	64 parser = optparse.OptionParser()
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	65 for flag in self.flags:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	66 if flag.nargs:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	67 parser.add_option(flag.fullabbrev, flag.fullname, action="store",
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	68 type="string", dest=flag.name)
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	69 else:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	70 parser.add_option(flag.fullabbrev, flag.fullname, action="store_true",
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	71 dest=flag.name)
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	72 try:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	73 (options, args) = parser.parse_args(arg.split())
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	74 except SystemExit, e:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	75 return {}, arg
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	76
0 febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	77 result = {}
9 f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	78 for (k,v) in options.__dict__.items():
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	79 if v == True:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	80 result[k] = []
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	81 elif v:
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	82 result[k] = [v]
f807c5cfa0de switched flagReader to optparse catherine@cordelia parents: 0 diff changeset	83 return result, ' '.join(args)
0 febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	84
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	85 def _test():
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	86 import doctest
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	87 doctest.testmod()
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	88
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	89 if __name__ == '__main__':
febfdc79550b moved repository to Assembla catherine@DellZilla.myhome.westell.com parents: diff changeset	90 _test()

Mercurial > python-cmd2

annotate flagReader.py @ 79:f583663c610f