Use a context manager for logfile resource management

apachedex/__init__.py

@@ -42,6 +42,7 @@
 
 from html import escape
 from collections import defaultdict, Counter
+from contextlib import nullcontext
 from datetime import datetime, timedelta, date, tzinfo
 from functools import partial
 from operator import itemgetter
@@ -1520,6 +1521,7 @@ def main():
         file=sys.stderr)
     if filename == '-':
       logfile = sys.stdin
+      logfile_context = nullcontext()
     else:
       for opener, exc in FILE_OPENER_LIST:
         logfile = opener(filename, 'rt', encoding=INPUT_ENCODING, errors=INPUT_ENCODING_ERROR_HANDLER)
@@ -1531,7 +1533,14 @@ def main():
           logfile.seek(0)
           break
       else:
-        logfile = open(filename, 'r', encoding=INPUT_ENCODING, errors=INPUT_ENCODING_ERROR_HANDLER)
+        logfile = open( # pylint: disable=consider-using-with
+          filename,
+          'r',
+          encoding=INPUT_ENCODING,
+          errors=INPUT_ENCODING_ERROR_HANDLER,
+        )
+      logfile_context = logfile
+    with logfile_context:
       lineno = 0
       for lineno, line in enumerate(logfile, 1):
         if show_progress and lineno % 5000 == 0: