add unit tests for examples, add default args.

.github/workflows/build.yml

@@ -55,7 +55,7 @@ jobs:
           editable: true
       - name: Run unit tests and generate coverage report
         run: |
-          coverage run --source=graphnet -m pytest tests/
+          coverage run --source=graphnet -m pytest tests/ examples/ --ignore=05_pisa
           coverage xml -o coverage.xml
       - name: Work around permission issue
         run: |
@@ -88,7 +88,7 @@ jobs:
       - name: Run unit tests and generate coverage report
         run: |
           set -o pipefail  # To propagate exit code from pytest
-          coverage run --source=graphnet -m pytest tests/ --ignore=tests/data/ --ignore=tests/deployment/
+          coverage run --source=graphnet -m pytest tests/ examples/ --ignore=tests/data/ --ignore=tests/deployment/ --ignore=examples/01_icetray --ignore=examples/05_pisa
           coverage report -m
 
   build-macos:
@@ -108,5 +108,5 @@ jobs:
       - name: Run unit tests and generate coverage report
         run: |
           set -o pipefail  # To propagate exit code from pytest
-          coverage run --source=graphnet -m pytest tests/ --ignore=tests/data/ --ignore=tests/deployment/
+          coverage run --source=graphnet -m pytest tests/ examples/ --ignore=tests/data/ --ignore=tests/deployment/ --ignore=examples/01_icetray --ignore=examples/05_pisa
           coverage report -m

examples/02_data/01_read_dataset.py

@@ -113,7 +113,13 @@ def main(backend: str) -> None:
 """
     )
 
-    parser.add_argument("backend", choices=["sqlite", "parquet"])
+    parser.add_argument(
+        "backend",
+        choices=["sqlite", "parquet"],
+        default="sqlite",
+        const="sqlite",
+        nargs="?",
+    )
 
     args = parser.parse_args()
 

examples/04_training/01_train_dynedge.py

@@ -213,7 +213,7 @@ def main(
 
     parser.with_standard_arguments(
         "gpus",
-        ("max-epochs", 5),
+        ("max-epochs", 1),
         "early-stopping-patience",
         ("batch-size", 16),
         "num-workers",

examples/04_training/02_train_tito_model.py

@@ -223,7 +223,7 @@ def main(
 
     parser.with_standard_arguments(
         "gpus",
-        ("max-epochs", 5),
+        ("max-epochs", 1),
         ("early-stopping-patience", 2),
         ("batch-size", 16),
         "num-workers",

examples/04_training/03_train_dynedge_from_config.py

@@ -138,7 +138,7 @@ def main(
         "dataset-config",
         "model-config",
         "gpus",
-        ("max-epochs", 5),
+        ("max-epochs", 1),
         "early-stopping-patience",
         ("batch-size", 16),
         "num-workers",

examples/04_training/04_train_multiclassifier_from_configs.py

@@ -175,7 +175,7 @@ def main(
             ),
         ),
         "gpus",
-        ("max-epochs", 5),
+        ("max-epochs", 1),
         "early-stopping-patience",
         ("batch-size", 16),
         "num-workers",