gnu: Add python-ipydatawidgets.

* gnu/packages/jupyter.scm (python-ipydatawidgets): New variable.

gnu/packages/jupyter.scm

@@ -37,6 +37,7 @@ (define-module (gnu packages jupyter)
   #:use-module (gnu packages python-build)
   #:use-module (gnu packages python-check)
   #:use-module (gnu packages python-crypto)
+  #:use-module (gnu packages python-science)
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages python-web)
   #:use-module (gnu packages rdf)
@@ -545,6 +546,38 @@ (define-public python-ipympl
 JupyterLab.")
     (license license:bsd-3)))
 
+(define-public python-ipydatawidgets
+  (package
+    (name "python-ipydatawidgets")
+    (version "4.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ipydatawidgets" version))
+       (sha256
+        (base32 "1g65nzlsb1cipmvh9v27b22kkmzwvg8zbf32hmg1c25mb65vbr6h"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "pytest" "-v")))))))
+    (propagated-inputs
+     (list python-ipywidgets python-numpy python-six python-traittypes))
+    (native-inputs
+     (list python-jupyter-packaging
+           python-nbval
+           python-pytest
+           python-pytest-cov))
+    (home-page "https://github.com/vidartf/ipydatawidgets")
+    (synopsis "Widgets to help facilitate reuse of large datasets across widgets")
+    (description
+     "This package provides a set of widgets to help facilitate reuse of large
+datasets across widgets.")
+    (license license:bsd-3)))
+
 (define-public python-voila
   (package
     (name "python-voila")