[gimp] Use the "with" keyword when dealing with file objects

[Jehan <jehanp src gnome org>]

commit 04688c311195d07a8f0d3d46dbbe39b2d7c89972
Author: Michal <m powalko gmail com>
Date:   Mon Sep 17 14:38:01 2018 +0200

    Use the "with" keyword when dealing with file objects
    
    According to: https://docs.python.org/3.6/tutorial/inputoutput.html

 plug-ins/pygimp/plug-ins/file-openraster.py | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)
---
diff --git a/plug-ins/pygimp/plug-ins/file-openraster.py b/plug-ins/pygimp/plug-ins/file-openraster.py
index 586356f37d..b945fd8fbe 100755
--- a/plug-ins/pygimp/plug-ins/file-openraster.py
+++ b/plug-ins/pygimp/plug-ins/file-openraster.py
@@ -86,9 +86,8 @@ def thumbnail_ora(filename, thumb_size):
 
     # create temp file
     tmp = os.path.join(tempdir, 'tmp.png')
-    f = open(tmp, 'wb')
-    f.write(orafile.read('Thumbnails/thumbnail.png'))
-    f.close()
+    with open(tmp, 'wb') as fid:
+        fid.write(orafile.read('Thumbnails/thumbnail.png'))
 
     img = pdb['file-png-load'](tmp)
     # TODO: scaling
@@ -287,15 +286,14 @@ def load_ora(filename, raw_filename):
 
             # create temp file. Needed because gimp cannot load files from inside a zip file
             tmp = os.path.join(tempdir, 'tmp.png')
-            f = open(tmp, 'wb')
-            try:
-                data = orafile.read(path)
-            except KeyError:
-                # support for bad zip files (saved by old versions of this plugin)
-                data = orafile.read(path.encode('utf-8'))
-                print 'WARNING: bad OpenRaster ZIP file. There is an utf-8 encoded filename that does not 
have the utf-8 flag set:', repr(path)
-            f.write(data)
-            f.close()
+            with open(tmp, 'wb') as fid:
+                try:
+                    data = orafile.read(path)
+                except KeyError:
+                    # support for bad zip files (saved by old versions of this plugin)
+                    data = orafile.read(path.encode('utf-8'))
+                    print 'WARNING: bad OpenRaster ZIP file. There is an utf-8 encoded filename that does 
not have the utf-8 flag set:', repr(path)
+                fid.write(data)
 
             # import layer, set attributes and add to image
             gimp_layer = pdb['gimp-file-load-layer'](img, tmp)