Fix context loader

.pre-commit-config.yaml

@@ -39,7 +39,7 @@ repos:
     - id: add-trailing-comma
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.6.9
+  rev: v0.7.2
   hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
@@ -62,7 +62,7 @@ repos:
     - id: nb-strip-paths
 
 - repo: https://github.com/tox-dev/pyproject-fmt
-  rev: 2.2.4
+  rev: v2.5.0
   hooks:
     - id: pyproject-fmt
 

ctd/read.py

@@ -36,29 +36,32 @@ def _normalize_names(name: str) -> str:
 def _open_compressed(fname: Path) -> str:
     """Open compressed gzip, gz, zip or bz2 files."""
     extension = fname.suffix.casefold()
-    if extension in [".gzip", ".gz"]:
-        cfile = gzip.open(str(fname))
-    elif extension == ".bz2":
-        cfile = bz2.BZ2File(str(fname))
-    elif extension == ".zip":
+    loaders = {
+        ".gzip": gzip.open,
+        ".gz": gzip.open,
+        ".bz2": bz2.BZ2File,
+        ".zip": zipfile.ZipFile,
+    }
+    loader = loaders.get(extension)
+    if loader is None:
+        valid = ", ".join(loaders.keys())
+        msg = (
+            "Unrecognized file extension. "
+            f"Expected {valid}, got {extension}."
+        )
+        raise ValueError(msg)
+
+    if extension == ".zip":
         # NOTE: Zip format may contain more than one file in the archive
         # (similar to tar), here we assume that there is just one file per
         # zipfile!  Also, we ask for the name because it can be different from
         # the zipfile file!!
-        zfile = zipfile.ZipFile(str(fname))
-        name = zfile.namelist()[0]
-        cfile = zfile.open(name)
-    else:
-        msg = (
-            "Unrecognized file extension. "
-            f"Expected .gzip, .bz2, or .zip, got {extension}"
-        )
-        raise ValueError(
-            msg,
-        )
-    contents = cfile.read()
-    cfile.close()
-    return contents
+        with loader(str(fname)) as zfile:
+            name = zfile.namelist()[0]
+            with zfile.open(name) as cfile:
+                return cfile.read()
+    with loader(str(fname)) as cfile:
+        return cfile.read()
 
 
 def _read_file(fname: str | Path | StringIO) -> StringIO:

pyproject.toml

@@ -18,6 +18,7 @@ classifiers = [
   "Programming Language :: Python :: 3 :: Only",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
 ]
 dynamic = [
   "dependencies",