Reorganize requirements

noxfile.py

@@ -6,16 +6,14 @@
 @nox.session(name="test")
 def run_test(session):
     """Run pytest."""
-    session.install(".")
-    session.install("pytest")
+    session.install(".[tests]")
     session.run("pytest")
 
 
 @nox.session(name="fast-test")
 def run_test_fast(session):
     """Run pytest."""
-    session.install(".")
-    session.install("pytest")
+    session.install(".[tests]")
     session.run("pytest", "-m", "not slow")
 
 
@@ -41,8 +39,7 @@ def lint(session):
 @nox.session(name="typing")
 def mypy(session):
     """Check type hints."""
-    session.install(".")
-    session.install("mypy")
+    session.install(".[typing]")
     session.run(
         "mypy",
         "--install-types",

setup.cfg

@@ -49,12 +49,7 @@ classifiers =
 install_requires =
     PyWavelets
     torch
-    scipy>=1.10
-    pooch
-    matplotlib
     numpy
-    pytest
-    nox
 
 python_requires = >=3.9
 
@@ -65,6 +60,18 @@ package_dir =
 [options.packages.find]
 where = src
 
+[options.extras_require]
+tests =
+    pytest
+    scipy>=1.10
+    # pooch is an optional scipy dependency for getting datasets
+    pooch
+typing =
+    mypy
+    # needed otherwise pytest decorators don't get typed properly
+    pytest
+examples =
+    matplotlib
 
 ##########################
 # Darglint Configuration #