python.pkgs.stripe: move to separate expression

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

@@ -0,0 +1,27 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, unittest2, mock, requests }:
+
+buildPythonPackage rec {
+  pname = "stripe";
+  version = "1.41.1";
+  name = "${pname}-${version}";
+
+  # Tests require network connectivity and there's no easy way to disable
+  # them. ~ C.
+  doCheck = false;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0zvffvq933ia5w5ll6xhx2zgvppgc6zc2mxhc6f0kypw5g2fxvz5";
+  };
+
+  buildInputs = [ unittest2 mock ];
+
+  propagatedBuildInputs = [ requests ];
+
+  meta = with stdenv.lib; {
+    description = "Stripe Python bindings";
+    homepage = "https://github.com/stripe/stripe-python";
+    license = licenses.mit;
+  };
+}