Use context manager when opening images [ci skip]

docs/handbook/tutorial.rst

@@ -74,7 +74,8 @@ Convert files to JPEG
         outfile = f + ".jpg"
         if infile != outfile:
             try:
-                Image.open(infile).save(outfile)
+                with Image.open(infile) as im:
+                    im.save(outfile)
             except IOError:
                 print("cannot convert", infile)
 

docs/reference/ImageDraw.rst

@@ -20,14 +20,14 @@ Example: Draw a gray cross over an image
 
     from PIL import Image, ImageDraw
 
-    im = Image.open("hopper.jpg")
+    with Image.open("hopper.jpg") as im:
 
-    draw = ImageDraw.Draw(im)
-    draw.line((0, 0) + im.size, fill=128)
-    draw.line((0, im.size[1], im.size[0], 0), fill=128)
+        draw = ImageDraw.Draw(im)
+        draw.line((0, 0) + im.size, fill=128)
+        draw.line((0, im.size[1], im.size[0], 0), fill=128)
 
-    # write to stdout
-    im.save(sys.stdout, "PNG")
+        # write to stdout
+        im.save(sys.stdout, "PNG")
 
 
 Concepts

docs/reference/ImageSequence.rst

@@ -14,12 +14,11 @@ Extracting frames from an animation
 
     from PIL import Image, ImageSequence
 
-    im = Image.open("animation.fli")
-
-    index = 1
-    for frame in ImageSequence.Iterator(im):
-        frame.save("frame%d.png" % index)
-        index += 1
+    with Image.open("animation.fli") as im:
+        index = 1
+        for frame in ImageSequence.Iterator(im):
+            frame.save("frame%d.png" % index)
+            index += 1
 
 The :py:class:`~PIL.ImageSequence.Iterator` class
 -------------------------------------------------

docs/reference/PixelAccess.rst

@@ -17,8 +17,8 @@ changes it.
 .. code-block:: python
 
     from PIL import Image
-    im = Image.open('hopper.jpg')
-    px = im.load()
+    with Image.open('hopper.jpg') as im:
+        px = im.load()
     print (px[4,4])
     px[4,4] = (0,0,0)
     print (px[4,4])

docs/reference/PyAccess.rst

@@ -18,8 +18,8 @@ The following script loads an image, accesses one pixel from it, then changes it
 .. code-block:: python
 
     from PIL import Image
-    im = Image.open('hopper.jpg')
-    px = im.load()
+    with Image.open('hopper.jpg') as im:
+        px = im.load()
     print (px[4,4])
     px[4,4] = (0,0,0)
     print (px[4,4])