Replaced .format with f- strings (#31660)

Author: leandermaben

pandas/tests/tseries/frequencies/test_to_offset.py

@@ -86,7 +86,7 @@ def test_to_offset_invalid(freqstr):
 
     # We escape string because some of our
     # inputs contain regex special characters.
-    msg = re.escape("Invalid frequency: {freqstr}".format(freqstr=freqstr))
+    msg = re.escape(f"Invalid frequency: {freqstr}")
     with pytest.raises(ValueError, match=msg):
         frequencies.to_offset(freqstr)
 

pandas/util/_print_versions.py

@@ -43,7 +43,8 @@ def get_sys_info() -> List[Tuple[str, Optional[Union[str, int]]]]:
                 ("python-bits", struct.calcsize("P") * 8),
                 ("OS", f"{sysname}"),
                 ("OS-release", f"{release}"),
-                # ("Version", "{version}".format(version=version)),
+                # FIXME: dont leave commented-out
+                # ("Version", f"{version}"),
                 ("machine", f"{machine}"),
                 ("processor", f"{processor}"),
                 ("byteorder", f"{sys.byteorder}"),
@@ -114,14 +115,13 @@ def show_versions(as_json=False):
 
     else:
         maxlen = max(len(x) for x in deps)
-        tpl = "{{k:<{maxlen}}}: {{stat}}".format(maxlen=maxlen)
         print("\nINSTALLED VERSIONS")
         print("------------------")
         for k, stat in sys_info:
-            print(tpl.format(k=k, stat=stat))
+            print(f"{{k:<{maxlen}}}: {{stat}}")
         print("")
         for k, stat in deps_blob:
-            print(tpl.format(k=k, stat=stat))
+            print(f"{{k:<{maxlen}}}: {{stat}}")
 
 
 def main() -> int: