gnu: Add python-aioredis.

* gnu/packages/databases.scm (python-aioredis): New variable.

gnu/packages/databases.scm

@@ -3963,6 +3963,41 @@ (define-public python-hiredis
 (define-public python2-hiredis
   (package-with-python2 python-hiredis))
 
+(define-public python-aioredis
+  (package
+    (name "python-aioredis")
+    (version "2.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "aioredis" version))
+       (sha256
+        (base32 "13nrkk45az6qdiwfpbw80ls6bfip0i27qlkh9gsp2b9zk6pim9ga"))))
+    (build-system python-build-system)
+    (arguments
+     (list #:phases #~(modify-phases %standard-phases
+                        (add-before 'check 'start-redis
+                          (lambda _
+                            (invoke "redis-server" "--daemonize" "yes")))
+                        (replace 'check
+                          (lambda* (#:key tests? #:allow-other-keys)
+                            (when tests?
+                              (invoke "pytest" "-vv")))))))
+    (native-inputs
+     (list python-pytest
+           python-pytest-asyncio
+           python-uvloop
+           redis))
+    (propagated-inputs
+     (list python-async-timeout
+           python-hiredis
+           python-typing-extensions))
+    (home-page "https://github.com/aio-libs/aioredis-py")
+    (synopsis "Redis support for Python's @code{asyncio} module")
+    (description "This package provides Redis support for the Python
+@code{asyncio} (PEP 3156) module.")
+    (license license:expat)))
+
 (define-public python-fakeredis
   (package
     (name "python-fakeredis")