Enforce ruff/flynt rules (FLY) (zarr-developers#2240)

* Apply ruff/flynt rule FLY002

FLY002 Consider f-string instead of string join

* Enforce ruff/flynt rules (FLY)

Author: DimitriPapadopoulos

pyproject.toml

@@ -208,6 +208,7 @@ extend-exclude = [
 [tool.ruff.lint]
 extend-select = [
     "B",   # flake8-bugbear
+    "FLY", # flynt
     "I",   # isort
     "ISC", # flake8-implicit-str-concat
     "PGH", # pygrep-hooks

src/zarr/core/group.py

@@ -676,7 +676,7 @@ async def _members(
                     async for child_key, val in obj._members(
                         max_depth=max_depth, current_depth=current_depth + 1
                     ):
-                        yield "/".join([key, child_key]), val
+                        yield f"{key}/{child_key}", val
             except KeyError:
                 # keyerror is raised when `key` names an object (in the object storage sense),
                 # as opposed to a prefix, in the store under the prefix associated with this group

src/zarr/store/remote.py

@@ -243,6 +243,6 @@ async def list_prefix(self, prefix: str) -> AsyncGenerator[str, None]:
         AsyncGenerator[str, None]
         """
 
-        find_str = "/".join([self.path, prefix])
+        find_str = f"{self.path}/{prefix}"
         for onefile in await self.fs._find(find_str, detail=False, maxdepth=None, withdirs=False):
             yield onefile.removeprefix(find_str)