From 982d242ba5fa377756f06ca6fc960c20d8990d4f Mon Sep 17 00:00:00 2001
From: Chris Ostrouchov <chris.ostrouchov@gmail.com>
Date: Sun, 29 Dec 2019 13:04:44 -0500
Subject: [PATCH] python3Packages.typesystem: init at 0.2.4

---
 .../python-modules/typesystem/default.nix     | 44 +++++++++++++++++++
 pkgs/top-level/python-packages.nix            |  2 +
 2 files changed, 46 insertions(+)
 create mode 100644 pkgs/development/python-modules/typesystem/default.nix

diff --git a/pkgs/development/python-modules/typesystem/default.nix b/pkgs/development/python-modules/typesystem/default.nix
new file mode 100644
index 000000000000..8a66d6cbcc9f
--- /dev/null
+++ b/pkgs/development/python-modules/typesystem/default.nix
@@ -0,0 +1,44 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, isPy27
+, pytest
+, pytestcov
+, jinja2
+, pyyaml
+}:
+
+buildPythonPackage rec {
+  pname = "typesystem";
+  version = "0.2.4";
+  disabled = isPy27;
+
+  src = fetchFromGitHub {
+    owner = "encode";
+    repo = pname;
+    rev = version;
+    sha256 = "1k0jwcky17zwaz2vx4x2zbsnp270g4mgn7kx5bpl8jgx76qmsnba";
+  };
+
+  propagatedBuildInputs = [
+    jinja2
+    pyyaml
+  ];
+
+  checkInputs = [
+    pytest
+    pytestcov
+  ];
+
+  # for some reason jinja2 not picking up forms directory (1% of tests)
+  checkPhase = ''
+    pytest --ignore=tests/test_forms.py
+  '';
+
+  meta = with lib; {
+    description = "A type system library for Python";
+    homepage = https://github.com/encode/typesystem;
+    license = licenses.bsd3;
+    maintainers = [ maintainers.costrouc ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8c69ce56044a..1826773c7389 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5104,6 +5104,8 @@ in {
 
   typesentry = callPackage ../development/python-modules/typesentry { };
 
+  typesystem = callPackage ../development/python-modules/typesystem { };
+
   s3transfer = callPackage ../development/python-modules/s3transfer { };
 
   seqdiag = callPackage ../development/python-modules/seqdiag { };