Ensure that the graph is set to be the current graph when scoring with multiple models

[frank-dong-ms-zz]

Address issue: #4568

[codecov]

Codecov Report

Merging #5149 into master will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5149      +/-   ##
==========================================
- Coverage   75.79%   75.78%   -0.02%     
==========================================
  Files         993      993              
  Lines      181067   181077      +10     
  Branches    19494    19494              
==========================================
- Hits       137240   137227      -13     
- Misses      38532    38553      +21     
- Partials     5295     5297       +2     

Flag	Coverage Δ
#Debug	75.78% <100.00%> (-0.02%)	⬇️
#production	71.68% <100.00%> (-0.02%)	⬇️
#test	88.92% <100.00%> (+<0.01%)	⬆️

Impacted Files	Coverage Δ
src/Microsoft.ML.TensorFlow/TensorflowTransform.cs	73.54% <100.00%> (+0.04%)	⬆️
...est/Microsoft.ML.Tests/TensorFlowEstimatorTests.cs	98.28% <100.00%> (+0.09%)	⬆️
....ML.AutoML/PipelineSuggesters/PipelineSuggester.cs	60.50% <0.00%> (-10.93%)	⬇️
...rosoft.ML.AutoML/Utils/SweepableParamAttributes.cs	47.89% <0.00%> (-4.21%)	⬇️
...rosoft.ML.AutoML/ColumnInference/TextFileSample.cs	59.60% <0.00%> (-2.65%)	⬇️
src/Microsoft.ML.AutoML/Sweepers/Parameters.cs	83.47% <0.00%> (-0.85%)	⬇️
...ML.Transforms/Text/StopWordsRemovingTransformer.cs	86.10% <0.00%> (-0.16%)	⬇️
...soft.ML.Data/DataLoadSave/Text/TextLoaderCursor.cs	89.58% <0.00%> (+0.32%)	⬆️

[sharwell]

I worry that this has the downside of making the TensorFlow API need to meet the compatibility requirements of the ML.NET API. This is particularly problematic for the Session type, which we know needs to be completely rewritten to follow managed resource rules.

[frank-dong-ms-zz]

Thanks Sam, this is valid concern. What about can expose a new public method to let user reset default graph?

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In reply to: 632123004 [](ancestors = 632123004)

[harishsk]

Since this is no longer making the Session variable as public, please update the title of the PR to reflect the solution.