Minor changes and better dependency handling

Makefile

@@ -2,25 +2,32 @@
 
 VENV_NAME?=env
 PYTHON=${VENV_NAME}/bin/python3
-FILES=linear_regression.py prepare_train_model.py test_model.py
+LINT_FILES=linear_regression.py prepare_train_model.py test_model.py
+
+LINEAR_REGRESSION=linear_regression.py
+OBJECT_DETECTION=prepare_train_model.py test_model.py
 
 .DEFAULT: help
 help:
+	@echo "make linear_regression"
+	@echo "       runs the simple linear regression example"
+	@echo "make objct_detection"
+	@ecgo "       runs the object detection example"
 	@echo "make env"
 	@echo "       creates and prepares the environment"
-	@echo "make clean"
-	@echo "       clean the development environment"
 	@echo "make data"
 	@echo "       downloads and unpacks the data"
 	@echo "make lint"
 	@echo "       runs pylint and mpy"
+	@echo "make clean"
+	@echo "       cleans the development environment"
 
 data: images
 images:
 	wget https://s3.us-east-2.amazonaws.com/naturalimages02/images.tar.gz
 	tar -xzf images.tar.gz
 
-env: $(VENV_NAME)/bin/activate data
+env: $(VENV_NAME)/bin/activate
 $(VENV_NAME)/bin/activate:
 	test -d $(VENV_NAME) || python3 -m venv $(VENV_NAME)
 	${PYTHON} -m pip install -U pip
@@ -32,8 +39,17 @@ $(VENV_NAME)/bin/activate:
 	${PYTHON} -m pip install mypy
 	touch $(VENV_NAME)/bin/activate
 
+linear_regression: env
+	${PYTHON} $(LINEAR_REGRESSION)
+
+object_detection_training: fine_tune.h5
+fine_tune.h5:
+	${PYTHON} prepare_train_model.py
+object_detection: env object_detection_training
+	${PYTHON} test_model.py
+
 lint: env
-	${PYTHON} -m pylint --rcfile=pylintrc $(FILES)
+	${PYTHON} -m pylint --rcfile=pylintrc $(LINT_FILES)
 
 clean:
 	rm -rf $(VENV_NAME)