Do not use f-strings in log calls.

It is in general bad practice; in particular if one want a structured
logging handler that store the template string and the values separately, using
f-strings makes it not possible.

I belive there is also a question of actually calling the formatter on
the interpolated values which is not done if the loging level is low
enough.

WHile it might not be too critical for micropip, I belive it is good
practive to show the example.

micropip/_commands/uninstall.py

@@ -39,15 +39,15 @@ def uninstall(packages: str | list[str], *, verbose: bool | int = False) -> None
             dist = importlib.metadata.distribution(package)
             distributions.append(dist)
         except importlib.metadata.PackageNotFoundError:
-            logger.warning(f"Skipping '{package}' as it is not installed.")
+            logger.warning("Skipping 's' as it is not installed.", package)
 
     for dist in distributions:
         # Note: this value needs to be retrieved before removing files, as
         #       dist.name uses metadata file to get the name
         name = dist.name
         version = dist.version
 
-        logger.info(f"Found existing installation: {name} {version}")
+        logger.info("Found existing installation: %s %s", name, version)
 
         root = get_root(dist)
         files = get_files_in_distribution(dist)
@@ -64,7 +64,9 @@ def uninstall(packages: str | list[str], *, verbose: bool | int = False) -> None
                     continue
 
                 logger.warning(
-                    f"A file '{file}' listed in the metadata of '{name}' does not exist.",
+                    "A file '%s' listed in the metadata of '%s' does not exist.",
+                    file,
+                    name,
                 )
 
                 continue
@@ -80,18 +82,18 @@ def uninstall(packages: str | list[str], *, verbose: bool | int = False) -> None
                 directory.rmdir()
             except OSError:
                 logger.warning(
-                    f"A directory '{directory}' is not empty after uninstallation of '{name}'. "
+                    "A directory '%s' is not empty after uninstallation of '%s'. "
                     "This might cause problems when installing a new version of the package. ",
+                    directory,
+                    name,
                 )
 
         if hasattr(loadedPackages, name):
             delattr(loadedPackages, name)
         else:
             # This should not happen, but just in case
-            logger.warning(
-                f"a package '{name}' was not found in loadedPackages.",
-            )
+            logger.warning("a package '%s' was not found in loadedPackages.", name)
 
-        logger.info(f"Successfully uninstalled {name}-{version}")
+        logger.info("Successfully uninstalled %s-%s", name, version)
 
     importlib.invalidate_caches()

micropip/transaction.py

@@ -140,7 +140,7 @@ def eval_marker(e: dict[str, str]) -> bool:
 
         satisfied, ver = self.check_version_satisfied(req)
         if satisfied:
-            logger.info(f"Requirement already satisfied: {req} ({ver})")
+            logger.info("Requirement already satisfied: %s (%s)", req, ver)
             return
 
         try:
@@ -193,7 +193,7 @@ async def _add_requirement_from_package_index(self, req: Requirement):
         # installed the wheel?
         satisfied, ver = self.check_version_satisfied(req)
         if satisfied:
-            logger.info(f"Requirement already satisfied: {req} ({ver})")
+            logger.info("Requirement already satisfied: %s (%s)", req, ver)
 
         await self.add_wheel(wheel, req.extras, specifier=str(req.specifier))
 
@@ -228,8 +228,8 @@ async def add_wheel(
             version=str(wheel.version),
         )
 
-        logger.info(f"Collecting {wheel.name}{specifier}")
-        logger.info(f"  Downloading {wheel.url.split('/')[-1]}")
+        logger.info("Collecting %s%s", wheel.name, specifier)
+        logger.info("  Downloading %s", wheel.url.split("/")[-1])
 
         await wheel.download(self.fetch_kwargs)
         if self.deps: