Re: less verbose Python lib

Sorry, this is a red herring, a generator is not going to work.  I just ran
a quick test...

>>> import yaml
>>> import time
>>> def g():
...     for i in range(10):
...             time.sleep(1)
...             yield i
...
>>>
>>> yaml.dump(g())
'!!python/object:builtins.generator {}\n'
>>> list(g())
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]



On Tue, Jun 12, 2012 at 4:43 PM, Nico Schlömer <[email protected]>wrote:

> It's not the storage requirements of the list that are inconvenient
> but the fact that I'd have to wait for too long: I want to have the
> output as soon as it's available.
> Is this a situation where a generator could be helpful? (I have no
> experience with those.)
>
>
>
> On Tue, Jun 12, 2012 at 11:18 PM, Daniel Goertzen
> <[email protected]> wrote:
> > Perhaps implement your items as a generator instead of building the whole
> > list ahead of time.
> >
> > Dan.
> >
> >
> > On Tue, Jun 12, 2012 at 4:01 PM, Nico Schlömer <[email protected]
> >
> > wrote:
> >>
> >> Compiling the list is difficult for me as the items take a long time
> >> to be computed (the emitter is supposed to be part of a numerical
> >> code), so I wouldn't want to have to wait for the last item to arrive
> >> until they're printed all together.
> >>
> >>
> >>
> >> On Tue, Jun 12, 2012 at 10:52 PM, Dennis Lissov <
> [email protected]>
> >> wrote:
> >> > Hello Nico,
> >> >
> >> > in Python YAML is typically mapped directly to the trees of objects.
> >> > The YAML sequence is mapped to the Python list, so using
> >> >
> >> >    yaml.dump(['eggs', 'bread', 'milk'], default_flow_style=False)
> >> >
> >> > and if the equivalent output of '[eggs, bread, milk]' is acceptable,
> >> > the keyword argument may also be omitted. Unless you need to
> >> > explicitly deal with the representation and serialization steps, it's
> >> > the easiest way to deal with YAML in Python.
> >> >
> >> > Good luck,
> >> > Dennis.
> >> >
> >> > On Tue, Jun 12, 2012 at 11:39 PM, Nico Schlömer
> >> > <[email protected]> wrote:
> >> >> Hi all,
> >> >>
> >> >> in C++, typical YAML usage looks like
> >> >>
> >> >> ============ *snip* ============
> >> >> YAML::Emitter out;
> >> >> out << YAML::BeginSeq;
> >> >> out << "eggs";
> >> >> out << "bread";
> >> >> out << "milk";
> >> >> out << YAML::EndSeq;
> >> >> ============ *snap* ============
> >> >>
> >> >> while the same thing in Python is (as far as I know)
> >> >> ============ *snip* ============
> >> >> print yaml.emit([yaml.StreamStartEvent(),
> >> >>                 yaml.DocumentStartEvent(),
> >> >>                 yaml.SequenceStartEvent(anchor=None, tag=None,
> >> >> implicit=True),
> >> >>                 yaml.ScalarEvent(anchor=None, tag=None,
> >> >> implicit=(True, False), value=u'eggs'),
> >> >>                 yaml.ScalarEvent(anchor=None, tag=None,
> >> >> implicit=(True, False), value=u'bread'),
> >> >>                 yaml.ScalarEvent(anchor=None, tag=None,
> >> >> implicit=(True, False), value=u'milk'),
> >> >>                 yaml.SequenceEndEvent()
> >> >>               ])
> >> >> ============ *snap* ============
> >> >>
> >> >> Is there any way to make this less verbose? (I don't even know why I
> >> >> need all these options.)
> >> >>
> >> >> Cheers,
> >> >> Nico
> >> >>
> >> >>
> >> >>
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