New submission from Daniel Kaplun <[email protected]>:
In the second example to allow usage of the required field for options,
it seems as if you already have all you need to implement the feature
into optparse. I modified it a bit to allow OptionGroups:
class Option(optparse.Option):
ATTRS = optparse.Option.ATTRS + ['required']
def _check_required(self):
if self.required and not self.takes_value():
raise OptionError(
"required flag set for option that doesn't take
a value",
self)
# Make sure _check_required() is called from the constructor!
CHECK_METHODS = optparse.Option.CHECK_METHODS + [_check_required]
def process(self, opt, value, values, parser):
optparse.Option.process(self, opt, value, values, parser)
parser.option_seen[self] = 1
class OptionParser(optparse.OptionParser):
def _init_parsing_state(self):
optparse.OptionParser._init_parsing_state(self)
self.option_seen = {}
def check_values(self, values, args):
for option in self.option_list + sum((optiongroup.option_list
for
optiongroup in self.option_groups), []):
if isinstance(option, Option) and option.required and
not
self.option_seen.has_key(option):
self.error("%s not supplied" % (option, ))
return (values, args)
The question: why hasn't your existing example been merged with the
OptionParse code to allow the required field for options?
----------
components: Extension Modules
messages: 90767
nosy: mindvirus
severity: normal
status: open
title: optparse required field for Options
versions: Python 2.4, Python 2.5, Python 2.6, Python 2.7, Python 3.0, Python
3.1, Python 3.2
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Python tracker <[email protected]>
<http://bugs.python.org/issue6535>
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