python.pkgs.datashape: move expression

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

@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, mock
+, numpy
+, multipledispatch
+, dateutil
+}:
+
+buildPythonPackage rec {
+  pname = "datashape";
+  version = "0.5.2";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "2356ea690c3cf003c1468a243a9063144235de45b080b3652de4f3d44e57d783";
+  };
+
+  checkInputs = [ pytest mock ];
+  propagatedBuildInputs = [ numpy multipledispatch dateutil ];
+
+  checkPhase = ''
+    py.test datashape/tests
+  '';
+
+  meta = {
+    homepage = https://github.com/ContinuumIO/datashape;
+    description = "A data description language";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ fridh ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -4523,29 +4523,7 @@ in {
     };
   };
 
-  datashape = buildPythonPackage rec {
+  datashape = callPackage ../development/python-modules/datashape { };
-    name = "datashape-${version}";
-    version = "0.5.2";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/D/DataShape/${name}.tar.gz";
-      sha256 = "2356ea690c3cf003c1468a243a9063144235de45b080b3652de4f3d44e57d783";
-    };
-
-    buildInputs = with self; [ pytest mock ];
-    propagatedBuildInputs = with self; [ numpy multipledispatch dateutil ];
-
-    checkPhase = ''
-      py.test datashape/tests
-    '';
-
-    meta = {
-      homepage = https://github.com/ContinuumIO/datashape;
-      description = "A data description language";
-      license = licenses.bsd2;
-      maintainers = with maintainers; [ fridh ];
-    };
-  };
 
   requests-cache = buildPythonPackage (rec {
     name = "requests-cache-${version}";