pythonPackages: remove name attribute`

The `buildPython*` function computes name from `pname` and `version`.
This change removes `name` attribute from all expressions in
`pkgs/development/python-modules`.

While at it, some other minor changes were made as well, such as
replacing `fetchurl` calls with `fetchPypi`.

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

@@ -1,12 +1,11 @@
-{ stdenv, fetchurl, python, buildPythonPackage, nose, future, coverage }:
+{ stdenv, fetchPypi, python, buildPythonPackage, nose, future, coverage }:
 
 buildPythonPackage rec {
   pname = "PyZufall";
   version = "0.13.2";
-  name = "${pname}-${version}";
 
-  src = fetchurl {
-    url = "mirror://pypi/${builtins.substring 0 1 pname}/${pname}/${name}.tar.gz";
+  src = fetchPypi {
+    inherit pname version;
     sha256 = "1jffhi20m82fdf78bjhncbdxkfzcskrlipxlrqq9741xdvrn14b5";
   };
 
@@ -14,7 +13,7 @@ buildPythonPackage rec {
   # https://github.com/nose-devs/nose/issues/1037
   doCheck = false;
 
-  buildInputs = [ nose coverage ];
+  checkInputs = [ nose coverage ];
   propagatedBuildInputs = [ future ];
 
   checkPhase = ''