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Created on 2009-01-04 06:50 by jkankiewicz, last changed 2022-04-11 14:56 by admin. This issue is now closed.
| Messages (2) | |||
|---|---|---|---|
| msg79039 - (view) | Author: Jason Kankiewicz (jkankiewicz) | Date: 2009-01-04 06:50 | |
"Callback example 1: trivial callback" reads
Here’s an example of a callback option that takes no arguments, and
simply records that the option was seen:
def record_foo_seen(option, opt_str, value, parser):
parser.saw_foo = True
parser.add_option("--foo", action="callback",
callback=record_foo_seen)
but the following paragraph
Of course, you could do that with the store_true action.
is wrong because
parser.add_option("--foo", action="store_true", dest="saw_foo")
would actually be duplicated by
def record_foo_seen(option, opt_str, value, parser):
parser.values.saw_foo = True
parser.add_option("--foo", action="callback",
callback=record_foo_seen)
For example:
>>> from optparse import OptionParser
>>> parser = OptionParser()
>>> def record_foo_seen(option, opt_str, value, parser):
... parser.saw_foo = True
...
>>> parser.add_option("--foo", action="callback", callback=record_foo_seen)
<Option at 0xab4f58: --foo>
>>> parser.parse_args(['--foo'])
(<Values at 0xabb0f8: {}>, [])
>>> parser = OptionParser()
>>> parser.add_option("--foo", action="store_true", dest="saw_foo")
<Option at 0xabb1e8: --foo>
>>> parser.parse_args(['--foo'])
(<Values at 0xabb1c0: {'saw_foo': True}>, [])
>>> parser = OptionParser()
>>> def record_foo_seen(option, opt_str, value, parser):
... parser.values.saw_foo = True
...
>>> parser.add_option("--foo", action="callback", callback=record_foo_seen)
<Option at 0xabb508: --foo>
>>> parser.parse_args(['--foo'])
(<Values at 0xabb3f0: {'saw_foo': True}>, [])
|
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| msg81206 - (view) | Author: Georg Brandl (georg.brandl) *  |
Date: 2009-02-05 11:33 | |
You're right, I've fixed that in r69298. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:56:43 | admin | set | github: 49077 |
| 2009-02-05 11:33:36 | georg.brandl | set | status: open -> closed resolution: fixed messages: + msg81206 |
| 2009-01-04 06:50:42 | jkankiewicz | create | |