diff --git a/pkgs/development/python-modules/fn/default.nix b/pkgs/development/python-modules/fn/default.nix
new file mode 100644
index 000000000000..d286459b1377
--- /dev/null
+++ b/pkgs/development/python-modules/fn/default.nix
@@ -0,0 +1,21 @@
+{ lib, buildPythonPackage, fetchPypi }:
+
+buildPythonPackage rec {
+  pname = "fn";
+  name = "${pname}-${version}";
+  version = "0.4.3";
+
+  meta = {
+    description = ''
+      Functional programming in Python: implementation of missing
+      features to enjoy FP
+    '';
+    homepage = https://github.com/kachayev/fn.py;
+    license = lib.licenses.asl20;
+  };
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1nmsjmn8jb4gp22ksx0j0hhdf4y0zm8rjykyy2i6flzimg6q1kgq";
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 7f5e5af363a9..d08a9f2fbe33 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9739,6 +9739,8 @@ in {
     };
   });
 
+  fn = callPackage ../development/python-modules/fn { };
+
   folium = callPackage ../development/python-modules/folium { };
 
   fontforge = pkgs.fontforge.override {