pythonPackages.gmusicapi: refactor move to python-modules

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

@@ -0,0 +1,29 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, mock
+, pyyaml
+}:
+
+buildPythonPackage rec {
+  pname = "helper";
+  version = "2.4.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "4e33dde42ad4df30fb7790689f93d77252cff26a565610d03ff2e434865a53a2";
+  };
+
+  buildInputs = [ mock ];
+  propagatedBuildInputs = [ pyyaml ];
+
+  # No tests
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "Development library for quickly writing configurable applications and daemons";
+    homepage = https://helper.readthedocs.org/;
+    license = licenses.bsd3;
+  };
+
+}