15/26: gnu: Add python-parsley.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit 0ce76141bfe52b7c65d6185d036b4eaad2a0f0a3
Author: Sharlatan Hellseher <sharlatanus@gmail.com>
AuthorDate: Tue May 30 20:58:40 2023 +0100

    gnu: Add python-parsley.
    
    * gnu/packages/python-xyz.scm (python-parsley): New variable.
    
    Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
---
 gnu/packages/python-xyz.scm | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index f2d04a1307..8cacdd5796 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -3829,6 +3829,39 @@ matplotlib plots or supply colors for a web 
application.")
 syntax.")
     (license license:x11)))
 
+(define-public python-parsley
+  (package
+    (name "python-parsley")
+    (version "1.3")
+    (source (origin
+              ;; The source distributed on PyPI is outdated.
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/pyga/parsley";)
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0550rw65ygqzbjc8a66hs355pzbx727kbn20dssdb6ls846gw2qs"))))
+    (build-system pyproject-build-system)
+    (arguments
+     (list
+      ;; XXX: Check why these 3 tests fail.
+      #:test-flags #~(list "-k"
+                           (string-append "not test_sending_empty_netstring"
+                            " and not test_sending_one_netstring"
+                            " and not test_sending_two_netstrings"))))
+    (native-inputs (list python-pytest python-twisted))
+    (home-page "https://launchpad.net/parsley";)
+    (synopsis "Parsing and pattern matching Python library")
+    (description
+     "Parsley is a parsing library using PEG algorithm, so each expression in
+the grammar rules works like a Python expression.  In particular, alternatives
+are evaluated in order, unlike table-driven parsers such as yacc, bison or PLY.
+Parsley is an implementation of OMeta, an object-oriented pattern-matching
+language.")
+    (license license:expat)))
+
 (define-public python-polib
   (package
     (name "python-polib")