Vraymond/bucky fix (#776)

## Summary of Changes
- Fixes bug in the Python preprocessor where 2to3 could fail in rare
edge cases
- Reverts Bucky coverage numbers
- Reverts changes to Gromet Object Count

### Related issues

Resolves ???

skema/program_analysis/python_preprocessor.py

@@ -12,12 +12,13 @@ def convert_python2_to_python3(source: str):
         temp_file.write(source)
 
     # Run 2to3 on the temporary file
-    subprocess.run(['2to3', '--write', '--nobackups', str(temp_file_path)], check=True)
-
-    # Read the converted Python 3 code
-    python3_code = temp_file_path.read_text()
-
+    try:
+        subprocess.run(['2to3', '--write', '--nobackups', str(temp_file_path)], check=True)
+        preprocessed_code = temp_file_path.read_text()
+    except subprocess.CalledProcessError:
+        preprocessed_code = source
+
     # Clean up the temporary file
     temp_file_path.unlink()
 
-    return python3_code
+    return preprocessed_code

skema/program_analysis/tests/test_model_coverage.py

@@ -20,7 +20,7 @@
     "Climlab-v1": [4306, 4306], 
     "Generated-Halfar": [128, 128], 
     "SV2AIR3-Waterloo-MATLAB": [0, 1020], 
-    "Bucky": [7503, 7537], 
+    "Bucky": [7537, 7537], 
     "ABM-REINA": [2622, 7078], 
     "Cornell-COVID19-sim-Frazier": [7250, 8725], 
     "ABM-Covasim": [14734, 31042], 

skema/skema_py/tests/test_server.py

@@ -202,9 +202,9 @@ def test_gromet_object_count():
     assert response.status_code == 200
     gromet_object_count = response.json()
     assert sum([value for key, value in gromet_object_count.items()]) > 0
-    assert gromet_object_count["boxes"] == 7
-    assert gromet_object_count["wires"] == 4
-    assert gromet_object_count["ports"] == 9
+    assert gromet_object_count["boxes"] == 16
+    assert gromet_object_count["wires"] == 6
+    assert gromet_object_count["ports"] == 14
 
 
 # TODO: Add more complex test case to test_get_pyacset