zk-shell: switch to python3, cleanup

pkgs/applications/misc/zk-shell/default.nix

···
-{ lib, fetchFromGitHub, pythonPackages }:
+{ lib, fetchFromGitHub, python3Packages }:
 
-pythonPackages.buildPythonApplication rec {
+python3Packages.buildPythonApplication rec {
+  pname = "zk-shell";
   version = "1.0.0";
-  name = "zk-shell-" + version;
 
   src = fetchFromGitHub {
     owner = "rgs1";
···
     sha256 = "0zisvvlclsf4sdh7dpqcl1149xbxw6pi1aqcwjbqblgf8m4nm0c7";
   };
 
-  propagatedBuildInputs = (with pythonPackages; [
-    ansi kazoo nose six tabulate twitter
-  ]);
+  propagatedBuildInputs = with python3Packages; [
+    ansi
+    kazoo
+    nose
+    six
+    tabulate
+    twitter
+  ];
 
-  #requires a running zookeeper, don't know how to fix that for the moment
+  # requires a running zookeeper, don't know how to fix that for the moment
   doCheck = false;
 
-  meta = {
+  meta = with lib; {
     description = "A powerful & scriptable shell for Apache ZooKeeper";
     homepage = "https://github.com/rgs1/zk_shell";
-    license = lib.licenses.asl20;
-    maintainers = [ lib.maintainers.mahe ];
-    platforms = lib.platforms.all;
+    license = licenses.asl20;
+    maintainers = [ maintainers.mahe ];
+    platforms = platforms.all;
   };
 }