Issue #10246: uu.encode didn't close file objects explicitly when filenames

were given to it.  Patch by Brian Brazil.

Lib/uu.py

@@ -44,6 +44,8 @@ def encode(in_file, out_file, name=None, mode=None):
     #
     # If in_file is a pathname open it and change defaults
     #
+    opened_files = []
+    try:
         if in_file == '-':
             in_file = sys.stdin.buffer
         elif isinstance(in_file, str):
@@ -55,6 +57,7 @@ def encode(in_file, out_file, name=None, mode=None):
                 except AttributeError:
                     pass
             in_file = open(in_file, 'rb')
+            opened_files.append(in_file)
         #
         # Open out_file if it is a pathname
         #
@@ -62,6 +65,7 @@ def encode(in_file, out_file, name=None, mode=None):
             out_file = sys.stdout.buffer
         elif isinstance(out_file, str):
             out_file = open(out_file, 'wb')
+            opened_files.append(out_file)
         #
         # Set defaults for name and mode
         #
@@ -78,6 +82,9 @@ def encode(in_file, out_file, name=None, mode=None):
             out_file.write(binascii.b2a_uu(data))
             data = in_file.read(45)
         out_file.write(b' \nend\n')
+    finally:
+        for f in opened_files:
+            f.close()
 
 
 def decode(in_file, out_file=None, mode=None, quiet=False):

Misc/NEWS

@@ -57,6 +57,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #10246: uu.encode didn't close file objects explicitly when filenames
+  were given to it.  Patch by Brian Brazil.
+
 - Issue #10198: fix duplicate header written to wave files when writeframes()
   is called without data.