locale: Use context manager for opening files in locale/grass_po_stats (OSGeo#6192)

Author: echoix

locale/grass_po_stats.py

@@ -14,6 +14,8 @@
 #
 #############################################################################
 
+from __future__ import annotations
+
 import codecs
 import glob
 import json
@@ -72,13 +74,14 @@ def read_msgfmt_statistics(msg, lgood, lfuzzy, lbad):
     return langdict, lgood, lfuzzy, lbad
 
 
-def langDefinition(fil):
-    f = codecs.open(fil, encoding="utf-8", errors="replace", mode="r")
-    for line in f.readlines():
-        if '"Language-Team:' in line:
-            lang = line.split(" ")[1:-1]
-            break
-    f.close()
+def langDefinition(fil: str) -> str:
+    lang: str | list[str] = ""
+    with codecs.open(fil, encoding="utf-8", errors="replace", mode="r") as f:
+        for line in f.readlines():
+            if '"Language-Team:' in line:
+                lang = line.split(" ")[1:-1]
+                break
+
     if len(lang) == 2:
         return " ".join(lang)
     if len(lang) == 1:
@@ -139,10 +142,9 @@ def writejson(stats, outfile):
     # write a string with pretty style
     outjson = os.linesep.join([line.rstrip() for line in fjson.splitlines()])
     # write out file
-    fout = open(outfile, "w")
-    fout.write(outjson)
-    fout.write(os.linesep)
-    fout.close()
+    with open(outfile, "w", encoding="utf-8") as fout:
+        fout.write(outjson)
+        fout.write(os.linesep)
     try:
         os.remove("messages.mo")
     except OSError: