From d7948dd494e89fd4c179f7a4118cf996c946c98f Mon Sep 17 00:00:00 2001
From: mcflugen <mcflugen@gmail.com>
Date: Sat, 28 Mar 2026 16:17:59 -0600
Subject: [PATCH] make numpy a typing-only dependency

* wrap numpy imports in TYPE_CHECKING
* remove numpy from runtime dependencies
* add numpy as a testing requirement
* update CI/nox configuration
---
 noxfile.py                | 3 +--
 pyproject.toml            | 3 ++-
 requirements.in           | 1 -
 requirements/requires.txt | 1 -
 src/bmipy/bmi.py          | 6 ++++--
 5 files changed, 7 insertions(+), 7 deletions(-)
 delete mode 100644 requirements.in
 delete mode 100644 requirements/requires.txt

diff --git a/noxfile.py b/noxfile.py
index af0e08f..e44b1f9 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -29,8 +29,7 @@ def test(session: nox.Session) -> None:
 @nox.session(name="test-cli")
 def test_cli(session: nox.Session) -> None:
     """Test the command line interface."""
-    session.install("-r", "requirements/requires.txt")
-    session.install(".", "--no-deps")
+    session.install(".")
     session.run("bmi-render", "--help")
     session.run("bmi-render", "--version")
 
diff --git a/pyproject.toml b/pyproject.toml
index 083e77b..2d94c66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,15 +30,16 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Physics",
 ]
 dependencies = [
-    "numpy",
 ]
 dynamic = [
     "readme",
 ]
 
 [project.optional-dependencies]
+dev = ["nox"]
 testing = [
   "coverage",
+  "numpy",
   "pytest",
 ]
 
diff --git a/requirements.in b/requirements.in
deleted file mode 100644
index 24ce15a..0000000
--- a/requirements.in
+++ /dev/null
@@ -1 +0,0 @@
-numpy
diff --git a/requirements/requires.txt b/requirements/requires.txt
deleted file mode 100644
index af47163..0000000
--- a/requirements/requires.txt
+++ /dev/null
@@ -1 +0,0 @@
-numpy==1.26.3
diff --git a/src/bmipy/bmi.py b/src/bmipy/bmi.py
index 4e84712..87094be 100644
--- a/src/bmipy/bmi.py
+++ b/src/bmipy/bmi.py
@@ -8,10 +8,12 @@
 
 from abc import ABC
 from abc import abstractmethod
+from typing import TYPE_CHECKING
 from typing import Any
 
-import numpy as np
-from numpy.typing import NDArray
+if TYPE_CHECKING:
+    import numpy as np
+    from numpy.typing import NDArray
 
 
 class Bmi(ABC):