python.pkgs: move my several packages to separate files

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

@@ -0,0 +1,23 @@
+{ lib, fetchurl, buildPythonPackage, numpy }:
+
+buildPythonPackage rec {
+  name = "hmmlearn-${version}";
+  version = "0.2.0";
+
+  src = fetchurl {
+    url = "mirror://pypi/h/hmmlearn/${name}.tar.gz";
+    sha256 = "0qc3fkdyrgfg31y1a8jzs83dxkjw78pqkdm44lll1iib63w4cik9";
+  };
+
+  propagatedBuildInputs = [ numpy ];
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Hidden Markov Models in Python with scikit-learn like API";
+    homepage    = "https://github.com/hmmlearn/hmmlearn";
+    license     = licenses.bsd3;
+    maintainers = with maintainers; [ abbradar ];
+    platforms   = platforms.unix;
+  };
+}