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Re: About the difference between xcom and variable


You can still specify task_ids, it's optional.


> On 9 May 2018, at 20:15, 刘松(Brain++组) <liusong02@xxxxxxxxxx> wrote:
> 
> Since that it might have multiple upstream tasks, so which task to specify? Or you change the xcom syntax to be global?
> 
> 
> 
> 
> On Wed, May 9, 2018 at 6:13 PM +0800, "刘松(Brain++组)" <liusong02@xxxxxxxxxx<mailto:liusong02@xxxxxxxxxx>> wrote:
> 
> What is the magic to remove the task id ?
> 
> 
> 
> 
> On Wed, May 9, 2018 at 3:38 PM +0800, "Beau Barker" <beauinmelbourne@xxxxxxxxx<mailto:beauinmelbourne@xxxxxxxxx>> wrote:
> 
> 
> Use xcom for communication between tasks.
> 
> In the upcoming version 1.10 there's no need to specify task_ids for xcom.
> 
> You can simply say:
> self.xcom_pull(context, key='name')
> 
> 
>> On 9 May 2018, at 17:22, Song Liu  wrote:
>> 
>> Hi,
>> 
>> For the cross-task communication, there are two options:
>> - xcom
>> - variable
>> 
>> if I have make sure the key of variable is global unique (such uuid), is there any other limitations or cons for using variable instead of xcom ? since that xcom should specify the task_id which is used not very convenient compared with variable.
>> 
>> Any information is appreciated.
>> 
>> Thanks,
>> Song
>