pythonPackages.construct: add python2-compatible expression

pkgs/development/python-modules/construct/2.10.54.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, buildPythonPackage, fetchFromGitHub, pythonOlder
+, six, pytestCheckHook, pytest-benchmark, enum34, numpy, arrow, ruamel_yaml
+}:
+
+buildPythonPackage rec {
+  pname   = "construct";
+  version = "2.10.54";
+
+  # no tests in PyPI tarball
+  src = fetchFromGitHub {
+    owner  = pname;
+    repo   = pname;
+    rev    = "v${version}";
+    sha256 = "1mqspsn6bf3ibvih1zna2glkg8iw7vy5zg9gzg0d1m8zcndk2c48";
+  };
+
+  checkInputs = [ pytestCheckHook pytest-benchmark enum34 numpy arrow ruamel_yaml ];
+
+  disabledTests = lib.optionals stdenv.isDarwin [ "test_multiprocessing" ];
+
+  pytestFlagsArray = [ "--benchmark-disable" ];
+
+  meta = with lib; {
+    description = "Powerful declarative parser (and builder) for binary data";
+    homepage = "https://construct.readthedocs.org/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1462,7 +1462,10 @@ in {
 
   constantly = callPackage ../development/python-modules/constantly { };
 
-  construct = callPackage ../development/python-modules/construct { };
+  construct = if isPy27 then
+    callPackage ../development/python-modules/construct/2.10.54.nix { }
+  else
+    callPackage ../development/python-modules/construct { };
 
   consul = callPackage ../development/python-modules/consul { };