[bug#68789] [PATCH 1/2] gnu: Add python-unyt.

[Troy Figiel <troy@troyfigiel.com>]

* gnu/packages/python-science.scm (python-unyt): New variable.
---
 gnu/packages/python-science.scm | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/gnu/packages/python-science.scm b/gnu/packages/python-science.scm
index 9d72608de4..3013c77c34 100644
--- a/gnu/packages/python-science.scm
+++ b/gnu/packages/python-science.scm
@@ -42,6 +42,7 @@
 (define-module (gnu packages python-science)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (gnu packages)
+  #:use-module (gnu packages astronomy)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bioinformatics)
   #:use-module (gnu packages boost)
@@ -1217,6 +1218,34 @@ (define-public python-statannot
 annotations on an existing boxplots and barplots generated by seaborn.")
     (license license:expat)))
 
+(define-public python-unyt
+  (package
+    (name "python-unyt")
+    (version "3.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "unyt" version))
+       (sha256
+        (base32 "00900bw24rxgcgwgxp9xlx0l5im96r1n5hn0r3mxvbdgc3lyyq48"))))
+    (build-system pyproject-build-system)
+    (propagated-inputs (list python-h5py ;optional import
+                             python-matplotlib ;optional import
+                             python-numpy
+                             python-sympy))
+    ;; python-astropy and python-pint are also optional imports, but we do not
+    ;; propagate them due to their sizes.
+    (native-inputs (list python-astropy python-pint python-pytest))
+    (home-page "https://unyt.readthedocs.io")
+    (synopsis "Library for working with data that has physical units")
+    (description
+     "Writing code that deals with data with physical units can be confusing.
+A function might return an array but at least with plain @code{numpy}, there
+is no way to easily tell what the units of the data are without somehow
+knowing a priori.  @code{unyt} handles this problem by providing a subclass of
+the @code{ndarray} class in @code{numpy} that is unit aware.")
+    (license license:bsd-3)))
+
 (define-public python-upsetplot
   (package
     (name "python-upsetplot")
-- 
2.42.0