pep8

PIL/Image.py

@@ -30,6 +30,7 @@ from PIL import VERSION, PILLOW_VERSION, _plugins
 
 import warnings
 
+
 class _imaging_not_installed:
     # module placeholder
     def __getattr__(self, id):
@@ -94,7 +95,8 @@ from PIL import ImageMode
 from PIL._binary import i8, o8
 from PIL._util import isPath, isStringType, deferred_error
 
-import os, sys
+import os
+import sys
 
 # type stuff
 import collections
@@ -108,6 +110,7 @@ try:
 except:
     HAS_CFFI = False
 
+
 def isImageType(t):
     """
     Checks if an object is an image object.
@@ -248,6 +251,7 @@ _MODE_CONV = {
     "I;32LS": ('<i4', None),
 }
 
+
 def _conv_type_shape(im):
     shape = im.size[1], im.size[0]
     typ, extra = _MODE_CONV[im.mode]
@@ -379,6 +383,7 @@ def init():
         _initialized = 2
         return 1
 
+
 # --------------------------------------------------------------------
 # Codec factories (used by tobytes/frombytes and ImageFile.load)
 
@@ -398,6 +403,7 @@ def _getdecoder(mode, decoder_name, args, extra=()):
     except AttributeError:
         raise IOError("decoder %s not available" % decoder_name)
 
+
 def _getencoder(mode, encoder_name, args, extra=()):
 
     # tweak arguments
@@ -421,14 +427,18 @@ def _getencoder(mode, encoder_name, args, extra=()):
 def coerce_e(value):
     return value if isinstance(value, _E) else _E(value)
 
+
 class _E:
     def __init__(self, data):
         self.data = data
+
     def __add__(self, other):
         return _E((self.data, "__add__", coerce_e(other).data))
+
     def __mul__(self, other):
         return _E((self.data, "__mul__", coerce_e(other).data))
 
+
 def _getscaleoffset(expr):
     stub = ["stub"]
     data = expr(_E(stub)).data
@@ -438,13 +448,15 @@ def _getscaleoffset(expr):
             return c, 0.0
         if (a is stub and b == "__add__" and isinstance(c, numbers.Number)):
             return 1.0, c
-    except TypeError: pass
+    except TypeError:
+        pass
     try:
         ((a, b, c), d, e) = data  # full syntax
         if (a is stub and b == "__mul__" and isinstance(c, numbers.Number) and
                 d == "__add__" and isinstance(e, numbers.Number)):
             return c, e
-    except TypeError: pass
+    except TypeError:
+        pass
     raise ValueError("illegal expression")
 
 
@@ -500,6 +512,7 @@ class Image:
     # Context Manager Support
     def __enter__(self):
         return self
+
     def __exit__(self, *args):
         self.close()
 
@@ -525,7 +538,6 @@ class Image:
         # object is gone.
         self.im = deferred_error(ValueError("Operation on closed image"))
 
-
     def _copy(self):
         self.load()
         self.im = self.im.copy()
@@ -533,7 +545,8 @@ class Image:
         self.readonly = 0
 
     def _dump(self, file=None, format=None):
-        import tempfile, os
+        import tempfile
+        import os
         suffix = ''
         if format:
             suffix = '.'+format
@@ -637,9 +650,11 @@ class Image:
         if self.mode != "1":
             raise ValueError("not a bitmap")
         data = self.tobytes("xbm")
-        return b"".join([("#define %s_width %d\n" % (name, self.size[0])).encode('ascii'),
+        return b"".join([
+            ("#define %s_width %d\n" % (name, self.size[0])).encode('ascii'),
             ("#define %s_height %d\n" % (name, self.size[1])).encode('ascii'),
-                ("static char %s_bits[] = {\n" % name).encode('ascii'), data, b"};"])
+            ("static char %s_bits[] = {\n" % name).encode('ascii'), data, b"};"
+            ])
 
     def frombytes(self, data, decoder_name="raw", *args):
         """
@@ -672,7 +687,9 @@ class Image:
 
         .. deprecated:: 2.0
         """
-        warnings.warn('fromstring() is deprecated. Please call frombytes() instead.', DeprecationWarning)
+        warnings.warn(
+            'fromstring() is deprecated. Please call frombytes() instead.',
+            DeprecationWarning)
         return self.frombytes(*args, **kw)
 
     def load(self):
@@ -783,7 +800,8 @@ class Image:
         trns = None
         delete_trns = False
         # transparency handling
-        if "transparency" in self.info and self.info['transparency'] is not None:
+        if "transparency" in self.info and \
+                self.info['transparency'] is not None:
             if self.mode in ('L', 'RGB') and mode == 'RGBA':
                 # Use transparent conversion to promote from transparent
                 # color to an alpha channel.
@@ -793,7 +811,8 @@ class Image:
                 t = self.info['transparency']
                 if isinstance(t, bytes):
                     # Dragons. This can't be represented by a single color
-                    warnings.warn('Palette images with Transparency expressed '+
+                    warnings.warn(
+                        'Palette images with Transparency expressed ' +
                         ' in bytes should be converted to RGBA images')
                     delete_trns = True
                 else:
@@ -812,7 +831,6 @@ class Image:
                         trns_im = trns_im.convert('RGB')
                     trns = trns_im.getpixel((0, 0))
 
-
         if mode == "P" and palette == ADAPTIVE:
             im = self.im.quantize(colors)
             new = self._new(im)
@@ -829,7 +847,8 @@ class Image:
                     # if we can't make a transparent color, don't leave the old
                     # transparency hanging around to mess us up.
                     del(new.info['transparency'])
-                    warnings.warn("Couldn't allocate palette entry for transparency")
+                    warnings.warn("Couldn't allocate palette entry " +
+                                  "for transparency")
             return new
 
         # colorspace conversion
@@ -856,7 +875,8 @@ class Image:
                     new_im.info['transparency'] = new_im.palette.getcolor(trns)
                 except:
                     del(new_im.info['transparency'])
-                    warnings.warn("Couldn't allocate palette entry for transparency")
+                    warnings.warn("Couldn't allocate palette entry " +
+                                  "for transparency")
             else:
                 new_im.info['transparency'] = trns
         return new_im
@@ -972,7 +992,8 @@ class Image:
         if isinstance(filter, collections.Callable):
             filter = filter()
         if not hasattr(filter, "filter"):
-            raise TypeError("filter argument should be ImageFilter.Filter instance or class")
+            raise TypeError("filter argument should be ImageFilter.Filter " +
+                            "instance or class")
 
         if self.im.bands == 1:
             return self._new(filter.filter(self.im))
@@ -1079,7 +1100,6 @@ class Image:
         self.load()
         return self.im.ptr
 
-
     def getpalette(self):
         """
         Returns the image palette as a list.
@@ -1097,7 +1117,6 @@ class Image:
         except ValueError:
             return None  # no palette
 
-
     def getpixel(self, xy):
         """
         Returns the pixel value at a given position.
@@ -1218,7 +1237,8 @@ class Image:
 
         if isImageType(box) and mask is None:
             # abbreviated paste(im, mask) syntax
-            mask = box; box = None
+            mask = box
+            box = None
 
         if box is None:
             # cover all of self
@@ -1501,6 +1521,7 @@ class Image:
                 math.cos(angle), math.sin(angle), 0.0,
                 -math.sin(angle), math.cos(angle), 0.0
                 ]
+
             def transform(x, y, matrix=matrix):
                 (a, b, c, d, e, f) = matrix
                 return a*x + b*y + c, d*x + e*y + f
@@ -1691,8 +1712,9 @@ class Image:
         important than quality.
 
         Also note that this function modifies the :py:class:`~PIL.Image.Image`
-        object in place.  If you need to use the full resolution image as well, apply
+        object in place.  If you need to use the full resolution image as well,
-        this method to a :py:meth:`~PIL.Image.Image.copy` of the original image.
+        apply this method to a :py:meth:`~PIL.Image.Image.copy` of the
+        original image.
 
         :param size: Requested size.
         :param resample: Optional resampling filter.  This can be one
@@ -1709,8 +1731,12 @@ class Image:
 
         # preserve aspect ratio
         x, y = self.size
-        if x > size[0]: y = int(max(y * size[0] / x, 1)); x = int(size[0])
+        if x > size[0]:
-        if y > size[1]: x = int(max(x * size[1] / y, 1)); y = int(size[1])
+            y = int(max(y * size[0] / x, 1))
+            x = int(size[0])
+        if y > size[1]:
+            x = int(max(x * size[1] / y, 1))
+            y = int(size[1])
         size = x, y
 
         if size == self.size:
@@ -1761,7 +1787,8 @@ class Image:
         """
 
         if self.mode == 'RGBA':
-            return self.convert('RGBa').transform(size, method, data, resample, fill).convert('RGBA')
+            return self.convert('RGBa').transform(
+                size, method, data, resample, fill).convert('RGBA')
 
         if isinstance(method, ImageTransformHandler):
             return method.transform(size, self, resample=resample, fill=fill)
@@ -1808,8 +1835,13 @@ class Image:
         elif method == QUAD:
             # quadrilateral warp.  data specifies the four corners
             # given as NW, SW, SE, and NE.
-            nw = data[0:2]; sw = data[2:4]; se = data[4:6]; ne = data[6:8]
+            nw = data[0:2]
-            x0, y0 = nw; As = 1.0 / w; At = 1.0 / h
+            sw = data[2:4]
+            se = data[4:6]
+            ne = data[6:8]
+            x0, y0 = nw
+            As = 1.0 / w
+            At = 1.0 / h
             data = (x0, (ne[0]-x0)*As, (sw[0]-x0)*At,
                     (se[0]-sw[0]-ne[0]+x0)*As*At,
                     y0, (ne[1]-y0)*As, (sw[1]-y0)*At,
@@ -1843,6 +1875,7 @@ class Image:
         im = self.im.transpose(method)
         return self._new(im)
 
+
 # --------------------------------------------------------------------
 # Lazy operations
 
@@ -1878,6 +1911,7 @@ class _ImageCrop(Image):
         # FIXME: future versions should optimize crop/paste
         # sequences!
 
+
 # --------------------------------------------------------------------
 # Abstract handlers.
 
@@ -1885,10 +1919,12 @@ class ImagePointHandler:
     # used as a mixin by point transforms (for use with im.point)
     pass
 
+
 class ImageTransformHandler:
     # used as a mixin by geometry transforms (for use with im.transform)
     pass
 
+
 # --------------------------------------------------------------------
 # Factories
 
@@ -1964,6 +2000,7 @@ def frombytes(mode, size, data, decoder_name="raw", *args):
     im.frombytes(data, decoder_name, args)
     return im
 
+
 def fromstring(*args, **kw):
     """Deprecated alias to frombytes.
 
@@ -2168,6 +2205,7 @@ def open(fp, mode="r"):
     raise IOError("cannot identify image file %r"
                   % (filename if filename else fp))
 
+
 #
 # Image processing.
 
@@ -2266,6 +2304,7 @@ def merge(mode, bands):
         im.putband(bands[i].im, i)
     return bands[0]._new(im)
 
+
 # --------------------------------------------------------------------
 # Plugin registry
 
@@ -2324,6 +2363,7 @@ def _show(image, **options):
     # override me, as necessary
     _showxv(image, **options)
 
+
 def _showxv(image, title=None, **options):
     from PIL import ImageShow
     ImageShow.show(image, title, **options)