python3Packages.boltons: add patch for pprint

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

@@ -3,40 +3,53 @@
 , fetchFromGitHub
 , fetchpatch
 , pytestCheckHook
+, pythonAtLeast
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "boltons";
   version = "20.2.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
-  # No tests in PyPi Tarball
   src = fetchFromGitHub {
     owner = "mahmoud";
     repo = "boltons";
     rev = version;
-    sha256 = "0vw0h0z81gfxgjfijqiza92ic0siv9xy65mklgj5d0dzr1k9waw8";
+    hash = "sha256-iCueZsi/gVbko7MW43vaUQMWRVI/YhmdfN29gD6AgG8=";
   };
 
-  patches = [
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  patches = lib.optionals (pythonAtLeast "3.10") [
+    # pprint has no attribute _safe_repr, https://github.com/mahmoud/boltons/issues/294
     (fetchpatch {
-      url = "https://github.com/mahmoud/boltons/commit/754afddf141ea26956c88c7e13fe5e7ca7942654.patch";
-      sha256 = "14kcq8pl4pmgcnlnmj1sh1yrksgym0kn0kgz2648g192svqkbpz8";
+      name = "fix-pprint-attribute.patch";
+      url = "https://github.com/mahmoud/boltons/commit/270e974975984f662f998c8f6eb0ebebd964de82.patch";
+      sha256 = "sha256-pZLfr6SRCw2aLwZeYaX7bzfJeZC4cFUILEmnVsKR6zc=";
     })
   ];
 
-  checkInputs = [ pytestCheckHook ];
   disabledTests = [
-    # This test is broken without this PR, which has not yet been merged
+    # This test is broken without this PR. Merged but not released
     # https://github.com/mahmoud/boltons/pull/283
-    "test_frozendict_ior"
+    "test_frozendict"
+  ];
+
+  pythonImportsCheck = [
+    "boltons"
   ];
 
   meta = with lib; {
     homepage = "https://github.com/mahmoud/boltons";
-    description = "220+ constructs, recipes, and snippets extending (and relying on nothing but) the Python standard library";
+    description = "Constructs, recipes, and snippets extending the Python standard library";
     longDescription = ''
-      Boltons is a set of over 220 BSD-licensed, pure-Python utilities
-      in the same spirit as — and yet conspicuously missing from — the
+      Boltons is a set of over 200 BSD-licensed, pure-Python utilities
+      in the same spirit as - and yet conspicuously missing from - the
       standard library, including:
 
       - Atomic file saving, bolted on with fileutils