python.pkgs.tornado: 4.4.2 -> 4.5.1

pkgs/development/python-modules/tornado/default.nix

@@ -0,0 +1,28 @@
+{ lib
+, python
+, buildPythonPackage
+, fetchPypi
+, backports_abc
+, backports_ssl_match_hostname
+, certifi
+, singledispatch
+}:
+
+buildPythonPackage rec {
+  pname = "tornado";
+  version = "4.5.1";
+  name = "${pname}-${version}";
+
+  propagatedBuildInputs = [ backports_abc backports_ssl_match_hostname certifi singledispatch ];
+
+  # We specify the name of the test files to prevent
+  # https://github.com/NixOS/nixpkgs/issues/14634
+  checkPhase = ''
+    ${python.interpreter} -m unittest discover *_test.py
+  '';
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "db0904a28253cfe53e7dedc765c71596f3c53bb8a866ae50123320ec1a7b73fd";
+  };
+}

pkgs/top-level/python-packages.nix

@@ -25537,23 +25537,7 @@ EOF
     };
   };
 
-  tornado = buildPythonPackage rec {
+  tornado = callPackage ../development/python-modules/tornado { };
-    name = "tornado-${version}";
-    version = "4.4.2";
-
-    propagatedBuildInputs = with self; [ backports_abc backports_ssl_match_hostname certifi singledispatch ];
-
-    # We specify the name of the test files to prevent
-    # https://github.com/NixOS/nixpkgs/issues/14634
-    checkPhase = ''
-      ${python.interpreter} -m unittest discover *_test.py
-    '';
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/t/tornado/${name}.tar.gz";
-      sha256 = "1k7d90afm5pivam90a37nqiz9wlmakvnsfymp3p43kcqz29gk618";
-    };
-  };
 
   tokenlib = buildPythonPackage rec {
     name = "tokenlib-${version}";