pythonPackages.w3lib: refactor move to python-modules

pkgs/development/python-modules/w3lib/default.nix

@@ -0,0 +1,26 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, six
+, pytest
+}:
+
+buildPythonPackage rec {
+  pname = "w3lib";
+  version = "1.17.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0vshh300ay5wn5hwl9qcb32m71pz5s6miy0if56vm4nggy159inq";
+  };
+
+  buildInputs = [ six pytest ];
+
+  meta = with stdenv.lib; {
+    description = "A library of web-related functions";
+    homepage = "https://github.com/scrapy/w3lib";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ drewkett ];
+  };
+
+}

pkgs/top-level/python-packages.nix

@@ -4539,24 +4539,7 @@ in {
 
   topydo = throw "python3Packages.topydo was moved to topydo"; # 2017-09-22
 
-  w3lib = buildPythonPackage rec {
+  w3lib = callPackage ../development/python-modules/w3lib { };
-    name = "w3lib-${version}";
-    version = "1.17.0";
-
-    buildInputs = with self ; [ six pytest ];
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/w/w3lib/${name}.tar.gz";
-      sha256 = "0vshh300ay5wn5hwl9qcb32m71pz5s6miy0if56vm4nggy159inq";
-    };
-
-    meta = {
-      description = "A library of web-related functions";
-      homepage = "https://github.com/scrapy/w3lib";
-      license = licenses.bsd3;
-      maintainers = with maintainers; [ drewkett ];
-    };
-  };
 
   queuelib = buildPythonPackage rec {
     name = "queuelib-${version}";