Open ScenarioConfig API to export a scenario config graph as a picture.

[jrobinAV]

The purpose of this issue is to let developers draw a scenario config DAG using matplotlib (or an alternative) and networkx to visualize the graph he just created, helping him understand if it is correct.

Description

In the ScenarioConfig class (located at taipy/core/config/scenario_config.py), we want a new method named draw() that exports the scenario configuration graph (a DAG) as an image file.

The graph comprises the input DataNodeConfigs, the output DataNodeConfigs, and the TaskConfigs as nodes.
There is a directed edge from a DatanodeConfig node to a TaskConfig node if and only if the DatanodeConfig is a TaskConfig input.
A directed edge is from a TaskConfig node to a DatanodeConfig node if and only if the DatanodeConfig is a TaskConfig input.

Implementation constraint.

If a new package is required (matplotlib?, marmaid?, etc.), it must be made optional. The draw function should check the presence of the package before using it. If the package is not installed, the draw function should log a warning message and return doing nothing else.

https://networkx.org/documentation/stable/reference/drawing.html

[FabienLelaquais]

I certainly don't like this idea, involving both the import of another (large) package but also impacts the global product homogeneity, as Taipy GUI and Taipy Studio already provide ways of representing DAGs.
Why chose a technology that we don't already use?

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[xyfer17]

@jrobinAV could you please assign this issue to me, I would like to take this up.

[satyyam11]

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[jrobinAV]

Yep sure, you are assigned, @xyfer17 .

[satyyam11]

Hey can you assign me this

[xyfer17]

@jrobinAV can you please tell me that image format should be a svg or png ( mention if any other format is suitable ), also what would be the warning log message please specify?

[jrobinAV]

@xyfer17 The functionality is really for developers, not for end-users, so I don't think the image format matters.
Both svg or png are good. By the way, the format could also be an optional parameter to the draw method with one of the two as a default value.

If you need an external package with a specific version range, and if the package is not installed, the log message could be:

f"Package '{package_name}' between version '{min_version}'and '{max_version}' is required to use the draw method. Please install the package first."