From a3b11c4a43eedf6fb18ed592ad5f708a10583931 Mon Sep 17 00:00:00 2001
From: Ruth Comer <ruth.comer@metoffice.gov.uk>
Date: Tue, 14 Nov 2023 15:52:47 +0000
Subject: [PATCH] Ruth fixes for unsafe fixes

---
 cf_units/__init__.py                    | 7 +++----
 cf_units/tests/test_coding_standards.py | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/cf_units/__init__.py b/cf_units/__init__.py
index 06debc0c..214503a1 100644
--- a/cf_units/__init__.py
+++ b/cf_units/__init__.py
@@ -929,7 +929,7 @@ def title(self, value):
             dt = self.num2date(value)
             result = dt.strftime("%Y-%m-%d %H:%M:%S")
         else:
-            result = f"{str(value)} {self}"
+            result = f"{value} {self}"
         return result
 
     @property
@@ -1792,9 +1792,8 @@ def convert(self, value, other, ctype=FLOAT64, inplace=False):
                     # Strict type check of numpy array.
                     if result.dtype.type not in (np.float32, np.float64):
                         raise TypeError(
-                            "Expect a numpy array of '{}' or '{}'".format(*np.float32),
-                            np.float64,
-                        )
+                            "Expect a numpy array of "
+                            f"'{np.float32}' or '{np.float64}'")
                     ctype = result.dtype.type
                     # Utilise global convenience dictionary
                     # _cv_convert_array to convert our array in 1d form
diff --git a/cf_units/tests/test_coding_standards.py b/cf_units/tests/test_coding_standards.py
index ff4d0364..660293aa 100644
--- a/cf_units/tests/test_coding_standards.py
+++ b/cf_units/tests/test_coding_standards.py
@@ -109,7 +109,7 @@ def test_license_headers(self):
             )
 
         failed = False
-        for fname, _last_change in sorted(last_change_by_fname.items()):
+        for fname in sorted(last_change_by_fname):
             full_fname = os.path.join(REPO_DIR, fname)
             if (
                 full_fname.endswith(".py")