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| References | (2 earlier) <07f4498c-7917-4315-85d4-73283a830f2d@googlegroups.com> <matlbh$r0s$1@ger.gmane.org> <CAPTjJmp=b2ZA8eqvyf3tqK+0MHqOgS-PAG+ELNNOwuKKPq4FJQ@mail.gmail.com> <mailman.18488.1423127457.18130.python-list@python.org> <54d33aa6$0$13003$c3e8da3$5496439d@news.astraweb.com> |
|---|---|
| From | Ian Kelly <ian.g.kelly@gmail.com> |
| Date | 2015-02-05 09:08 -0700 |
| Subject | Re: meaning of: line, = |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.18491.1423152554.18130.python-list@python.org> (permalink) |
On Thu, Feb 5, 2015 at 2:40 AM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> Devin Jeanpierre wrote:
>
>> On Wed, Feb 4, 2015 at 1:18 PM, Chris Angelico <rosuav@gmail.com> wrote:
>>> On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten <__peter__@web.de> wrote:
>>>> Another alternative is to put a list literal on the lefthand side:
>>>>
>>>>>>> def f(): yield 42
>>>>
>>>> ...
>>>>>>> [result] = f()
>>>>>>> result
>>>> 42
>>>
>>> Huh, was not aware of that alternate syntax.
>>
>> Nor are most people. Nor is Python, in some places -- it seems like
>> people forgot about it when writing some bits of the grammar.
>
> Got an example where you can use a,b but not [a,b] or (a,b)?
>>> def f(a, (b, c)):
... print a, b, c
...
>>> f(3, [4, 5])
3 4 5
>>> def g(a, [b, c]):
File "<stdin>", line 1
def g(a, [b, c]):
^
SyntaxError: invalid syntax
Although to be fair, the first syntax there is no longer valid either
in Python 3.
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Re: meaning of: line, = Albert-Jan Roskam <fomcl@yahoo.com> - 2015-02-04 14:38 +0000
Re: meaning of: line, = Rustom Mody <rustompmody@gmail.com> - 2015-02-04 07:09 -0800
Re: meaning of: line, = Peter Otten <__peter__@web.de> - 2015-02-04 18:36 +0100
Re: meaning of: line, = Chris Angelico <rosuav@gmail.com> - 2015-02-05 08:18 +1100
Re: meaning of: line, = Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-02-05 01:10 -0800
Re: meaning of: line, = Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-05 20:40 +1100
Re: meaning of: line, = Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-05 09:08 -0700
Re: meaning of: line, = Rustom Mody <rustompmody@gmail.com> - 2015-02-05 08:45 -0800
Re: meaning of: line, = Skip Montanaro <skip.montanaro@gmail.com> - 2015-02-05 10:56 -0600
Re: meaning of: line, = Tim Chase <python.list@tim.thechases.com> - 2015-02-05 11:00 -0600
Re: meaning of: line, = Rustom Mody <rustompmody@gmail.com> - 2015-02-05 08:59 -0800
Re: meaning of: line, = Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-02-06 05:09 -0800
Re: meaning of: line, = Rustom Mody <rustompmody@gmail.com> - 2015-02-06 05:20 -0800
Re: meaning of: line, = Rustom Mody <rustompmody@gmail.com> - 2015-02-06 06:03 -0800
Re: meaning of: line, = Tim Chase <python.list@tim.thechases.com> - 2015-02-05 10:21 -0600
Re: meaning of: line, = Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-02-05 17:12 -0800
Re: meaning of: line, = Chris Angelico <rosuav@gmail.com> - 2015-02-06 12:17 +1100
Re: meaning of: line, = Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-02-06 17:52 +1300
Re: meaning of: line, = Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-02-06 12:30 +1300
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