ENH: Make tensorflow,torch,zarr packages optional

.github/workflows/build-test-package.yml

@@ -41,7 +41,7 @@ jobs:
 
       - name: Install histomics_stream
         run: |
-          pip install .
+          pip install .[tensorflow,torch,zarr]
 
       - name: Lint with flake8
         run: |

histomics_stream/configure.py

@@ -185,7 +185,6 @@ def __call__(self, slide):
 
         # Do the work.
         if not re.compile(r"\.zarr$").search(filename):
-
             # create large_image, prioritizing tiff source over openslide
             try:
                 import large_image_source_tiff

pyproject.toml

@@ -8,19 +8,28 @@ readme = "README.md"
 requires-python = ">=3.6"
 authors = [{name = "Lee A. Newberg", email = "[email protected]"}]
 maintainers = [{name = "Lee A. Newberg", email = "[email protected]"}]
-keywords = ["tensorflow", "whole slide image", "stream", "machine learning"]
+keywords = ["tensorflow", "torch", "whole slide image", "stream", "machine learning"]
 classifiers = ["License :: OSI Approved :: Apache Software License"]
 dependencies = [
     "imagecodecs",
     "itk",
     "numcodecs",
     "numpy",
     "scipy",
+]
+dynamic = ["version", "description"]
+
+[project.optional-dependencies]
+tensorflow = [
     "tensorflow<3.0.0",
+    "keras",
+]
+torch = [
     "torch<2.0.0",
+]
+zarr = [
     "zarr",
 ]
-dynamic = ["version", "description"]
 
 [project.urls]
 Source = "https://github.com/DigitalSlideArchive/HistomicsStream"