gnu: Add python-pysolr.

* gnu/packages/python-web.scm (python-pysolr): New variable.

gnu/packages/python-web.scm

@@ -4368,3 +4368,28 @@ for Python.  It is mainly used by the ZODB.")
 Agent is a web crawler.  It uses the list of registered robots from
 @url{http://www.robotstxt.org}.")
     (license license:gpl3+)))
+
+(define-public python-pysolr
+  (package
+    (name "python-pysolr")
+    (version "3.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pysolr" version))
+        (sha256
+         (base32
+          "1rj5jmscvxjwcmlfi6hmkj44l4x6n3ln5p7d8d18j566hzmmzw3f"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; Tests require network access.
+    (propagated-inputs
+     `(("python-requests" ,python-requests)))
+    (native-inputs
+     `(("python-setuptools-scm" ,python-setuptools-scm)))
+    (home-page "https://github.com/django-haystack/pysolr/")
+    (synopsis "Lightweight python wrapper for Apache Solr")
+    (description
+     "This module provides an interface that queries the Apache Solr server
+using a pure Python implementation.")
+    (license license:bsd-3)))