Math functions return int in Python 3

src/PIL/GifImagePlugin.py

@@ -25,6 +25,7 @@
 #
 
 import itertools
+import math
 import os
 import subprocess
 
@@ -701,14 +702,12 @@ def _get_optimize(im, info):
 
 def _get_color_table_size(palette_bytes):
     # calculate the palette size for the header
-    import math
-
     if not palette_bytes:
         return 0
     elif len(palette_bytes) < 9:
         return 1
     else:
-        return int(math.ceil(math.log(len(palette_bytes) // 3, 2))) - 1
+        return math.ceil(math.log(len(palette_bytes) // 3, 2)) - 1
 
 
 def _get_header_palette(palette_bytes):

src/PIL/Image.py

@@ -2015,8 +2015,8 @@ class Image:
                 x, y = transform(x, y, matrix)
                 xx.append(x)
                 yy.append(y)
-            nw = int(math.ceil(max(xx)) - math.floor(min(xx)))
-            nh = int(math.ceil(max(yy)) - math.floor(min(yy)))
+            nw = math.ceil(max(xx)) - math.floor(min(xx))
+            nh = math.ceil(max(yy)) - math.floor(min(yy))
 
             # We multiply a translation matrix from the right.  Because of its
             # special form, this is the same as taking the image of the

src/PIL/ImageOps.py

@@ -298,7 +298,7 @@ def scale(image, factor, resample=Image.BICUBIC):
     elif factor <= 0:
         raise ValueError("the factor must be greater than 0")
     else:
-        size = (int(round(factor * image.width)), int(round(factor * image.height)))
+        size = (round(factor * image.width), round(factor * image.height))
         return image.resize(size, resample)
 
 

src/PIL/JpegImagePlugin.py

@@ -614,7 +614,7 @@ def _save(im, fp, filename):
 
     info = im.encoderinfo
 
-    dpi = [int(round(x)) for x in info.get("dpi", (0, 0))]
+    dpi = [round(x) for x in info.get("dpi", (0, 0))]
 
     quality = info.get("quality", 0)
     subsampling = info.get("subsampling", -1)