gnu: Add python-activepapers.

* gnu/packages/python.scm (python-activepapers, python2-activepapers):
New variables.

Co-authored-by: Ludovic Courtès <ludovic.courtes@inria.fr>

gnu/packages/python.scm

@@ -12001,3 +12001,73 @@ particularly convenient for use in tests.")
 (define-public python2-tempdir
   (package-with-python2 python-tempdir))
 
+(define-public python-activepapers
+  (package
+    (name "python-activepapers")
+    (version "0.2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ActivePapers.Py" version))
+       (sha256
+        (base32
+         "12wkhjh90ffipjzv10swndp2xv9hd7xrxvg6v0n4n3i411pj4xb8"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((ice-9 ftw)
+                  (srfi srfi-1)
+                  (guix build utils)
+                  (guix build python-build-system))
+
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'delete-python2-code
+           (lambda _
+             (for-each delete-file
+                       '("lib/activepapers/builtins2.py"
+                         "lib/activepapers/standardlib2.py"
+                         "lib/activepapers/utility2.py"))))
+         (replace 'check
+           (lambda _
+             ;; Deactivate the test cases that download files
+             (setenv "NO_NETWORK_ACCESS" "1")
+             ;; For some strange reason, some tests fail if nosetests runs all
+             ;; test modules in a single execution. They pass if each test
+             ;; module is run individually.
+             (for-each (lambda (filename)
+                         (invoke "nosetests"
+                                 (string-append "tests/" filename)))
+                       (scandir "tests"
+                                (lambda (filename)
+                                  (string-suffix? ".py" filename)))))))))
+    (native-inputs
+     `(("python-tempdir" ,python-tempdir)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-h5py" ,python-h5py)))
+    (home-page "http://www.activepapers.org/")
+    (synopsis "Executable papers for scientific computing")
+    (description
+     "ActivePapers is a tool for working with executable papers, which
+combine data, code, and documentation in single-file packages,
+suitable for publication as supplementary material or on repositories
+such as figshare or Zenodo.")
+    (properties `((python2-variant . ,(delay python2-activepapers))))
+    (license license:bsd-3)))
+
+(define-public python2-activepapers
+  (let ((base (package-with-python2
+               (strip-python2-variant python-activepapers))))
+    (package
+      (inherit base)
+      (arguments
+       (substitute-keyword-arguments (package-arguments base)
+         ((#:phases phases)
+          `(modify-phases ,phases
+             (delete 'delete-python2-code)
+             (add-after 'unpack 'delete-python3-code
+               (lambda _
+                 (for-each delete-file
+                           '("lib/activepapers/builtins3.py"
+                             "lib/activepapers/standardlib3.py"
+                             "lib/activepapers/utility3.py")))))))))))