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42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
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import optparse
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class Option (optparse.Option):
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ATTRS = optparse.Option.ATTRS + ['required']
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def _check_required (self):
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if self.required and not self.takes_value():
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raise OptionError(
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"required flag set for option that doesn't take a value",
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self)
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# Make sure _check_required() is called from the constructor!
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CHECK_METHODS = optparse.Option.CHECK_METHODS + [_check_required]
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def process (self, opt, value, values, parser):
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optparse.Option.process(self, opt, value, values, parser)
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parser.option_seen[self] = 1
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class OptionParser (optparse.OptionParser):
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def _init_parsing_state (self):
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optparse.OptionParser._init_parsing_state(self)
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self.option_seen = {}
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def check_values (self, values, args):
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for option in self.option_list:
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if (isinstance(option, Option) and
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option.required and
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not self.option_seen.has_key(option)):
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self.error("%s not supplied" % option)
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return (values, args)
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parser = OptionParser(option_list=[
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Option("-v", action="count", dest="verbose"),
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Option("-f", "--file", required=1)])
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(options, args) = parser.parse_args()
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print "verbose:", options.verbose
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print "file:", options.file
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