[PATCH] gnu: Add python-ply and python2-ply.

[Danny Milosavljevic <dannym+a@scratchpost.org>]

gnu: Add python-ply and python2-ply.
* gnu/packages/python.scm (python-ply, python2-ply): New variables.
---
 gnu/packages/python.scm | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index dfbf2cc..3ca2a86 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -9009,3 +9009,30 @@ focus on event-based network programming and multiprotocol integration.")
 
 (define-public python2-twisted
   (package-with-python2 python-twisted))
+
+(define-public python-ply
+  (package
+    (name "python-ply")
+    (version "3.8")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append
+               "https://pypi.python.org/packages/96/e0/"
+               "430fcdb6b3ef1ae534d231397bee7e9304be14a47a267e82ebcb3323d0b5/ply-"
+               version
+               ".tar.gz"))
+        (sha256
+          (base32
+            "1f70ipynmiy09k6px2j7v4w5cdrc21za3xs2k6f1bsvb0bzvvlg7"))))
+    (build-system python-build-system)
+    (inputs
+      `(("python-setuptools" ,python-setuptools)))
+    (home-page "http://www.dabeaz.com/ply/")
+    (synopsis "Python Lex & Yacc")
+    (description "ply is an lex/yacc implemented purely in Python.  It uses
+LR parsing and does extensive error checking.")
+    (license bsd-3)))
+
+(define-public python2-ply
+  (package-with-python2 python-ply))