Closing file descriptor provided by mkstemp

b2/console_tool.py

@@ -1638,11 +1638,14 @@ def get_local_output_filepath(
 
         # Default permissions are: readable and writable by this user only, executable by noone.
         # This "temporary" file is not automatically removed, but still created in the safest way possible.
-        _handle, output_filepath_str = tempfile.mkstemp(
+        fd_handle, output_filepath_str = tempfile.mkstemp(
             prefix=file_name,
             suffix=file_extension,
             dir=output_directory,
         )
+        # Close the handle, so the file is not locked.
+        # This file is no longer 100% "safe", but that's acceptable.
+        os.close(fd_handle)
 
         # "Normal" file created by Python has readable for everyone, writable for user only.
         # We change the permissions, to match the default ones.