Re: Quoting strings of digits

The PyYAML version is 3.12

$ pip2 show pyyaml
> Name: PyYAML
> Version: 3.12
> Summary: YAML parser and emitter for Python
> Home-page: http://pyyaml.org/wiki/PyYAML
> Author: Kirill Simonov
> Author-email: xi-RCSp1WnSyaseIZ0/[email protected]
> License: MIT
> Location: /Users/conwaythomas/Library/Python/2.7/lib/python/site-packages
> Requires:


On 21 November 2017 at 08:51, Andrey Somov <[email protected]> wrote:

> I quote the spec for YAML 1.2 (core schema) :
>  [-+]? [0-9]+      tag:yaml.org,2002:int (Base 10)
>
> SnakeYAML implements YAML 1.1
>
> What is the PyYAML version ?
>
> Cheers,
> Andrey
>
> On Mon, Nov 20, 2017 at 8:15 PM, Laurent Lyaudet <
> [email protected]> wrote:
>
>> Hi Thomas,
>>
>> In my humble opinion, I think the problem is on the Java side.
>> If I quote the spec for YAML 1.2 :
>> "Decimal integer notation, with a leading “-” character for negative
>> values, matching the regular expression 0 | -? [1-9] [0-9]*"
>> As you can see, there is no leading zero tolerated for integers except
>> for the value 0.
>> Hence 08063075 is a valid string element, pyyaml can strip the quotes
>> and snakeyaml should understand that.
>>
>> Best regards,
>>    Laurent Lyaudet
>>
>> 2017-11-20 2:10 GMT+01:00 Thomas Conway <[email protected]>:
>> > Hi Yamlies,
>> >
>> > I have a bit of a problem where some of our tools use Java, and some
>> Python
>> > (2). The output of the python is consumed by the Java, and
>> inconsistencies
>> > are leading to some problems. My question is which if any behaviours are
>> > incorrect with respect to the specification?
>> >
>> > I've cut down the problem to the following.
>> >
>> > Consider the following python code (using pyyaml):
>> >
>> > import sys
>> > import yaml
>> > w = {'userName': 'scientist ', 'userEmail': '[email protected]',
>> > 'sampleName': '08063075', 'fastqDir':
>> > '/foo/bar/baz/171108_M00139_0253_000000000-BHFD5/ProjectFold
>> ers/Project_Qux-Wombat-/Sample_08063075',
>> > 'analysis': 'Somatic_Run375_MY_DY_08112017', 'laneNo': 1, 'panel':
>> > 'Somatic_Panel_Manifest_v4_23_10_2015'}
>> > yaml.dump(w, sys.stdout, default_flow_style=False)
>> >
>> > which produces the output:
>> >
>> > analysis: Somatic_Run375_MY_DY_08112017
>> > fastqDir:
>> > /foo/bar/baz/171108_M00139_0253_000000000-BHFD5/ProjectFolde
>> rs/Project_Qux-Wombat-/Sample_08063075
>> > laneNo: 1
>> > panel: Somatic_Panel_Manifest_v4_23_10_2015
>> > sampleName: 08063075
>> > userEmail: [email protected]
>> > userName: 'scientist '
>> >
>> > Note in particular that the string value for the key 'sampleName' is a
>> > sequence of digits with a leading zero, and is not quoted.
>> >
>> > When we read it in to our java system (using snakeyaml), the unquoted
>> > sequence of digits is turned into an integer, which means that
>> subsequent
>> > steps drop the leading zero.
>> >
>> > I've tried reading the specification, but I can't see that it defines
>> the
>> > conversion.
>> >
>> > Is the serialisation valid?
>> >
>> > Is the conversion of the string of digits to an integer valid?
>> >
>> > Thanks for any precision you can add to my understanding,
>> >
>> > Tom.
>> > --
>> > Dr Thomas Conway
>> > [email protected]
>> > My friends, love is better than anger. Hope is better than fear.
>> Optimism is
>> > better than despair. So let us be loving, hopeful and optimistic. And
>> we'll
>> > change the world. - Jack Layton
>> >
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-- 
Thomas Conway
[email protected]
My friends, love is better than anger. Hope is better than fear. Optimism
is better than despair. So let us be loving, hopeful and optimistic. And
we'll change the world. - Jack Layton

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