Call SkySpark Functions

[p2ya]

I wanted to ask if we can call developed functions in SkySpark with specific inputs through pyhaystack and get the result back ?

[ChristianTremblay]

I will need more details. I know very little from skyspark and I don't have access to a site where I can make tests. Is there a way to call functions from REST API ?

[sjlongland]

I think I helped @pierresigwalt with this a few weeks back. It's an eval call, correct?

We managed to do it with a call like this:

self.session._get_grid('eval',expr='expr=navFilter("sparkTarget",readAll(equip)).sparks(2017-02).sparkHis', callback=lambda *a, **k: None)

Not friendly, we're calling private methods here… but doable.

We will have to add an evalexpr() endpoint to the SkySpark classes methinks… that'll wrap the above code up in a nice easy-to-call function.

[pierresigwalt]

Exactly,

I was able to request particular data using the library.

Code sample:

def get_eval(self, arg_expr):
        url = '/eval?expr=%s' % arg_expr
        result = self.session._get_grid(url, callback=lambda *a, **k: None)
        return result

[ChristianTremblay]

@pierresigwalt @sjlongland I think this should be implemented in skyspark client, and documented. Skyspark is widely used and custom functions compliance inside pyhaystack can be a game changer for someone considering using python and Skyspark vs only Skyspark. Pierre's function is clear.

[sjlongland]

On 05/07/17 11:14, Christian Tremblay wrote:

@pierresigwalt https://github.com/pierresigwalt @sjlongland https://github.com/sjlongland I think this should be implemented in skyspark client, and documented. Skyspark is widely used and custom functions compliance inside pyhaystack can be a game changer for someone considering using python and Skyspark vs only Skyspark. Pierre's function is clear.

Agreed. :-)

-- Stuart Longland (aka Redhatter, VK4MSL)

I haven't lost my mind... ...it's backed up on a tape somewhere.

[ChristianTremblay]

As it is a very small modification, I didn't create a feature branch. Please have a look to https://github.com/ChristianTremblay/pyhaystack/commit/de81823a0c9e82621fd4ae86101842ec810b34a0

[ChristianTremblay]

I corrected many little errors I made yesterday in the hurry.... I've been able to test

session.get_eval("readAll(site)")

It works great now : https://github.com/ChristianTremblay/pyhaystack/commit/469bde306dd1751837b485374f37c09e9fe93b45

[ChristianTremblay]

@p2ya can you confirm that we are responding to your need with get_eval function. If so, I will close the issue.

Thanks for your interest in pyhaystack

[p2ya]

Thanks for the update, however I get the following error: AttributeError: 'SkysparkHaystackSession' object has no attribute 'get_eval'

[pierresigwalt]

Hum,

What I checked is still in the develop branch (get_eval feature) so if you want to test you may use that branch instead of the master.

Christian will be able to confirm but I think it has not been pushed yet to Master.

Thank you

[p2ya]

Hi @ChristianTremblay , can you please let me know how I can test this or if it is possible to push it to the master branch

[sjlongland]

Try:

pip install git+https://github.com/ChristianTremblay/pyhaystack.git@develop

[p2ya]

Installed and tested, I get the following error: GetGridOperation failed When I try: op = session.get_eval("readAll(site)") op.wait() print op

[p2ya]

Hi @sjlongland, Any idea why I get this error and how it can be handled ?

[sjlongland]

Not the foggiest. I might suggest you use print op.result not print op.

The former will print the actual result, or raise the error caused, the latter just returns a string representation of the state machine which simply tells us that it didn't work, it doesn't tell us why.

[p2ya]

thanks for the comment @sjlongland the error is: pyhaystack.client.http.exceptions.HTTPStatusError: [Errno 404 Client Error: Not Found for url: http://IP/api/sites//eval?expr=readAll(site)] 404

it seems that the issue is double // in the http

[sjlongland]

That appears to suggest the server doesn't support eval.

[p2ya]

I can get the result when I run the same request with one "/" in the browser though as: http://IP/api/sites/eval?expr=readAll(site) rather than http://IP/api/sites//eval?expr=readAll(site)

[p2ya]

Hi @ChristianTremblay , you reckon this can be fixed ?

[ChristianTremblay]

This won't be fixed right now as I'm in the middle of my summer vacations. But I will give a high priority to this as soon as I come back.

[p2ya]

Hi @ChristianTremblay, no worries. Hope you have a nice holiday and looking forward to hear back from you to test this again and bring it into action.

[p2ya]

the latest update has fixed the issue and I can call eval function.