[bug#27851] Update eyed3. ([PATCH 1/2] gnu: Add python-grako)

[Thomas Danckaert <post@thomasdanckaert.be>]

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Hi Guix,

I'm sending two patches to update eyed3 to version 0.8 (and switch it 
over to python3).  This patch adds grako, a new requirement for eyed3 
0.8.

Question: do we need a python2 variant for every python package?  At 
the moment, eyed3 is the only package using grako, and I've switched 
eyed3 to python3.  I think it's OK to leave out the python2 versio of 
grako then (we can always add it if a future package needs it)?  For 
now I included it in the patch.

Thomas

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From 1916f4d665b55be7e1ed9dad087dc9a24f8cdace Mon Sep 17 00:00:00 2001
From: Thomas Danckaert <thomas.danckaert@gmail.com>
Date: Thu, 27 Jul 2017 16:45:19 +0200
Subject: [PATCH 1/2] gnu: Add python-grako

* gnu/packages/python.scm (python-grako): New variable.
---
 gnu/packages/python.scm | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index d110a1cb3..466ff705a 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -4983,6 +4983,34 @@ Python language binding specification.")
 (define-public python2-drmaa
   (package-with-python2 python-drmaa))
 
+(define-public python-grako
+  (package
+    (name "python-grako")
+    (version "3.99.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri
+        (pypi-uri "grako" version ".zip"))
+       (sha256
+        (base32
+         "0r63i68wcnv63rfjkasq1ah81frz61a6mzbcnaxhrkdpx84p7hzw"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; Test file 'grako.ebnf' is missing from archive.
+    (native-inputs
+     `(("unzip" ,unzip)
+       ("python-pytest" ,python-pytest-3.0)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://bitbucket.org/neogeny/grako")
+    (synopsis "EBNF parser generator")
+    (description
+     "Grako takes a grammar in a variation of EBNF as input, and outputs a
+memoizing PEG/Packrat parser in Python.")
+    (license license:bsd-3)))
+
+(define-public python2-grako
+  (package-with-python2 python-grako))
+
 (define-public python-gridmap
   (package
     (name "python-gridmap")
-- 
2.13.2