Fix unsupported operand type(s) for / error in AdversarialPatch in Tensorflow

[deepakupman]

Description

The error occurred in the file "adversarial_patch_tensorflow.py" at line 277. The error message indicated that there was an unsupported operand type for division (/) between a 'Dimension' and an 'int', and it suggested using '//' instead.

To resolve this issue, I added the .as_list() method to the TensorFlow tensor's shape attribute.

Fixes #2273

Type of change

Please check all relevant options.

• Improvement (non-breaking)
• Bug fix (non-breaking)
• New feature (non-breaking)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Testing

Please describe the tests that you ran to verify your changes. Consider listing any relevant details of your test configuration.

• [x ] Tested AdversarialPatchTensorFlowV2

Test Configuration:

• OS
• Python version
• ART version or commit number
• TensorFlow / Keras / PyTorch / MXNet version

Checklist

• [ x] My code follows the style guidelines of this project
• [ x] I have performed a self-review of my own code
• [ x] I have commented my code
• I have made corresponding changes to the documentation
• [ x] My changes generate no new warnings
• [ x] I have added tests that prove my fix is effective or that my feature works
• [ x] New and existing unit tests pass locally with my changes

[beat-buesser]

hi @deepakupman Thank you very much and congratulations to your first accepted pull request into ART!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.80%. Comparing base (161c406) to head (f015029).

Additional details and impacted files

@@              Coverage Diff               @@
##           dev_1.16.0    #2276      +/-   ##
==============================================
+ Coverage       83.87%   85.80%   +1.92%     
==============================================
  Files             318      318              
  Lines           28329    28329              
  Branches         5157     5157              
==============================================
+ Hits            23761    24307     +546     
+ Misses           3243     2709     -534     
+ Partials         1325     1313      -12     

Files with missing lines	Coverage Δ
.../adversarial_patch/adversarial_patch_tensorflow.py	81.04% <100.00%> (ø)

... and 17 files with indirect coverage changes